Simplify the expression. 19m – 4m^2 + 4m^2
Answer:
19m
General Formulas and Concepts:
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightAlgebra I
Terms/CoefficientsStep-by-step explanation:
Step 1: Define
Identify
19m - 4m² + 4m²
Step 2: Simplify
[Addition] Combine like terms: 19mAnswer:
19m-4m^2+4m^2
-4m^2+4m^2; since both are opposite you subtract which is zero
Answer=19m
At a party there are 30 students over the
age of 18 and 20 students under 18. You
randomly choose 3 students over 18 and 2
students under 18 to interview. This is an
example of:
A. A convenience sample
B. A self-selected sample
C. A systematic sample
D. A random sample
Answer:
The answer is C
Acellus sux
Step-by-step explanation:
Systematic sampling is a probability sampling approach in which researchers choose individuals of the population at a predetermined regular interval. The correct option is C, a systematic sample.
What is systematic Sampling?Systematic sampling is a probability sampling approach in which researchers choose individuals of the population at a predetermined regular interval (or k).
If the population order is random or random-like (e.g., alphabetical), this approach will yield a representative sample from which inferences about the population can be drawn.
Given that At a party there are 30 students over the age of 18 and 20 students under 18. You randomly choose 3 students over 18 and 2 students under 18 to interview.
Because you cannot get a list of your people in advance. As a result, the entire instance presented to us is an example of systematic sampling.
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Pwease help i will give you brain thing if its correct ♡
Answer:
1. A, B, C, E
2.Im not sure I think A
hope this helps
have a good day :)
Step-by-step explanation:
PLZ HELP IF WRONG ILL REPORT
Best Buy wants to know whether customers liked the televisions they purchased from the store in the past year.
The store calls and asks every 4th person who bought a television within the past year whether he or she likes it.
Is this sample biased or unbiased? Please explain your reasoning! (Tell why)
Answer:
The store calls and asks every 4th person who bought a television within the past year whether he or she likes it.
It is biased because opinion was shared..
The two triangles below are congruent by which case of congruence?
O SSA
O SAS
O ASA
SSS
Answer:
SSS
Step-by-step explanation:
SSS
It takes 5/8 can of paint to paint a wall. How many complete walls can I paint with 5 1/2 cans of paint? How much will be left over?
Answer:
8 complete walls with 1/5 can of paint remaining
Step-by-step explanation:
5 1/2 ÷ 5/8 = 11/2 × 8/5 = 44/5 or 8 4/5
twice y is at most 29
Answer:
2t=29
Step-by-step explanation:
the phrase is at most means we set the constant 29 less than or equal to the term 2t using the (<=) operator
What is the degree measure of FEG?
A 20°
B 31°
C 56°
D
124°
Answer:
C) 56
Step-by-step explanation:
DEG and FEG are on a straight line forming 180 degree.
Set your formula up as
180 = (3x+31)+(2x-6)
180 = 3x +2x +31 - 6
180 - 31 + 6 = 5x
155 = 5x
155/5 = x
31 = x
Now substitute 31 in place of x
FEG = (2*31-6)
FEG = 56
Mark is going to purchase a $9,000 motorcycleHis bank will finance his purchase through an add-on interest loan. They will charge Mark 7% interest over 5 years
How much in interest ?
Answer:
The interest to be charged is $ 3,150.
Step-by-step explanation:
Since Mark is going to purchase a $ 9,000 motorcycle, and his bank will finance his purchase through an add-on interest loan, and they will charge Mark 7% interest over 5 years, to determine how much in interest will be charged, the following calculation has to be done:
9000 x 0.07 x 5 = X
630 x 5 = X
3150 = X
Therefore, the interest to be charged is $ 3,150.
solve this answer
2/3 + 4/6
Step 1
Now we need to make our denominators match.
6 goes into 3 evenly, so we only need to multiply one term to get a common denominator.
Multiply 2 by 2, and get 4, then we multiply 3 by 2 and get 6.
We now have a new problem, that looks like this: 4/6+4/6
Step 2
Since our denominators match, we can add the numerators.
4 + 4 = 8
That gives us the sum, which is 8/6
Step 3
Now, do we need to simplify this fraction?
First, we attempt to divide it by 2...
Are both the numerator and the denominator evenly divisible by 2? Yes! So we reduce it:
8/6÷ 2 = 4/3
Let's try dividing by that again...
Nope! So now we try the next greatest prime number, 3...
Nope! So now we try the next greatest prime number, 5...
No good. 5 is larger than 4. So we're done reducing.
There you have it! Here's the final answer to 2/3 + 4/6
.a) Imagine you and your friend get a new card with an 18% APR and a $10 minimum payment and use this card to purchase the same mobile phone. If the first friend pays the minimum each month, while the second friend pays $20, what will their balances be after one month?
Answer:
yes
Step-by-step explanation:
yes yes you need to do the thing yeah
Answer:
yes
Step-by-step explanation:
a) Imagine you and your friend get a new card with an 18% APR and a $10 minimum payment and use this card to purchase the same mobile phone. If the first friend pays the minimum each month, while the second friend pays $20, what will their balances be after one month?
A newspaper article indicated that 43 percent of cars with black seats are white, 46 percent of cars with black seats are blue, 7 percent of cars with black seats are red, and 4 percent of cars with black seats are black. A test was conducted to investigate whether the color of cars with black seats was consistent with the newspaper article. A random sample of cars of these colors was selected, and the value of the chi-square test statistic was
Complete question :
A newspaper article indicated that 43 percent of cars with black seats are white, 46 percent of cars with black seats are blue, 7 percent of cars with black seats are red, and 4 percent of cars with black seats are black. A test was conducted to investigate whether the color of cars with black seats was consistent with the newspaper article. A random sample of cars of these colors was selected, and the value of the chi-square test statistic was x = 8.2. Which of the following represents the p-value for the test?
A) P(x2 ≥ 8.2) = 0.08
B) P(x2 ≥ 8.2) = 0.04
C) P(x2 ≤ 8.2) = 0.96
D) P (x2 = 8.2) = 0.00
E) The p-value cannot be calculated because the sample size is not given.
Answer:
P(χ² ≥ 8.2) = 0.04
Step-by-step explanation:
We need to obtain the degree of freedom ;
Number of levels, k - 1
k = (white, blue, red, black) = 4
df = k - 1= 4 - 1 = 3
The test statistic, χ² = 8.2
The Pvalue is the probability of a Chisquare statistic with 3 degree of freedom is equal to or more extreme than the statistic value, 8.2
Using the Pvalue for calculator from Chisquare statistic, at 3 degree of freedom
Pvalue(8.2, 3) = 0.042
Hence,
P(χ² ≥ 8.2) = 0.04
Arrange the expressions below in order from least to greatest. Place the least at the top and greatest at the bottom. 72 ÷ 8 − 2 × ( 3 + 1 ) ( 72 ÷ 8 ) − 2 × 3 + 1 72 ÷ ( 8 − 2 ) × 3 + 1 72 ÷ ( 8 − 2 ) × ( 3 + 1 )
72 / 8 - 2 x 3 + 1 equals 1
(72 / 8) - 2 x 3 + 1 equals 4
72 / (8 - 2) x 3 + 1 equals 37
72 / (8 - 2) x (3 + 1) equals 48
Following Add-On Contains the content I think your doing:
The expressions are arranged in ascending order will be 72÷8−2×(3 + 1) > (72÷8)−2×3+1 > 72÷(8−2)×3+1 > 72÷(8−2)×(3+1).
What is ascending order?It is the order of the numbers in which a smaller number comes first and then followed by the next number and then the last number will be the biggest one.
The expressions are given below:
72÷8−2×(3 + 1), (72÷8)−2×3+1, 72÷(8−2)×3+1, 72÷(8−2)×(3+1)
Simplify the expression, then we have
72÷8−2×(3 + 1), (72÷8)−2×3+1, 72÷(8−2)×3+1, 72÷(8−2)×(3+1)
9−2×4, 9−6+1, (72÷6)×3+1, (72÷6)×4
1, 2, 37, 48
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Round 684,321 to the nearest hundred thousand.
Answer:
700,000 SHEEEEEEEEEEEEEESH
LAST QUESTION NEED HELP ASAP IM TIMED
Tiffany earns an annual income of $55,000. After she pays taxes, her take home pay is $41,800. What
percentage of her annual income does Tiffany pay in taxes?
Answer:
24%
Step-by-step explanation:
Taxes
t = 55000 - 41800
t = 13200
% tax
p = 13200/55000 * 100
p = 24%
Bank of America offers a 5-year 8% continuously compounded investment option.
Find the amount accrued if $1450 is invested.
Answer:
A = $2130.49
Step-by-step explanation:
Given the following data;
Time, t = 5 years
Interest rate, r = 8%
Principal = $1450
To find the future value, we would use the compound interest formula;
[tex] A = P(1 + \frac{r}{100})^{t}[/tex]
Where;
A is the future value.
P is the principal or starting amount.
r is annual interest rate.
t is the number of years for the compound interest.
Substituting into the equation, we have;
[tex] A = 1450(1 + \frac{8}{100})^{5}[/tex]
[tex] A = 1450(1 + 0.08)^{5}[/tex]
[tex] A = 1450(1.08)^{5}[/tex]
[tex] A = 1450 * 1.4693 [/tex]
A = $2130.49
Select all numbers that are solutions to the inequality k > 5 a 4
b 5
c 6
d 5.01
e 5.2
f 0.5
Answer: C D E
Step-by-step explanation:
can someone help me on this
Answer:
[tex] \frac{3}{4} = \frac{9}{12} [/tex]
[tex] \frac{1}{3} = \frac{2}{6} [/tex]
[tex] \frac{2}{4} = \frac{4}{8} [/tex]
Step-by-step explanation:
To generate equivalent fractions, you can either multiply the numerator and denominator by the same number or divide the numerator and denominator by a number provided the numerator and denominator remains whole number.
Let's solve the given problem:
Problem 1:
[tex] \frac{3}{4} = \frac{x}{12} [/tex]
To find the numerator that will make the fractions equivalent, the numerator would be multiplied by the same number that was used to multiply the denominator of the first fraction (4), from which the denominator of the second fraction (12) was gotten.
Here, the denominator of the first fraction, 4, was multiplied by 3 to get the denominator of the second fraction = 12.
Therefore, the numerator of the second fraction would be gotten by multiplying the numerator of the first fraction, 3 by 3 = 9.
Thus:
[tex] \frac{3}{4} = \frac{3*3}{4*3} [/tex]
[tex] \frac{3}{4} = \frac{9}{12} [/tex]
Both fractions are now equivalent because they now have the same value. 3÷4 will give you the same value as 9÷12.
Problem 2:
[tex] \frac{1}{3} = \frac{2}{x} [/tex]
The numerator, 1, was multiplied by 2 to get 2.
Therefore:
[tex] \frac{1}{3} = \frac{1*2}{3*2} [/tex]
[tex] \frac{1}{3} = \frac{2}{6} [/tex]
Problem 3:
[tex] \frac{2}{4} = \frac{x}{y} [/tex]
We can either divide the denominator and numerator by the same number which should remain a whole number, or multiply the denominator and numerator by the same number.
Let's multiply by 2 to get am equivalent fraction.
[tex] \frac{2}{4} = \frac{2*2}{4*2} [/tex]
[tex] \frac{2}{4} = \frac{4}{8} [/tex]
The rectangle below has an area of zº +82 + 15 square meters and a width of 2 + 3 meters.
What expression represents the length of the rectangle?
Length
2 +3
2° +8x + 15
Length
meters
Answer:
(x + 5) m
Step-by-step explanation:
From the question given above, the following data were obtained:
Area (A) = (x² + 8x + 15) m²
Width (W) = (x + 3) m
Length (L) =?
The lenght of the rectangle can be obtained as follow:
A = L × W
x² + 8x + 15 = L (x + 3)
Divide both side by x + 3
L = x² + 8x + 15 / x + 3
L = (x + 5) m
Please attached photo for explanation.
Therefore, the length of the rectangle is: (x + 5) m
The spinner is divided into 5 equal sections. Trina is going to spin the arrow once.
red
green
yellow
red
What is the probability that the arrow will land on a red section?
A 20%
B. 25%
C. 40%
D. 50%
E. 67%
Answer:
Did you mean 4 equal sections, not 5 equal sections?
Step-by-step explanation:
Did you mean 4 equal sections, not 5 equal sections?
Answer:
ther answer is 100% c
Step-by-step explanation:
i did the test
Find the missing lengths.
Answer:
that angle is 45°
so y = 5√3
and × = √2×y
x= √2 × 5√3
x=5√6
please help!!
-will award brainliest
A. infinite set of points on the line
B. {} or empty set
C. point in quadrant 2
9514 1404 393
Answer:
A. infinite set of points on the line
Step-by-step explanation:
If we assume you're interested in the set of points that are on both lines a and b, that is ...
infinite set of points on the line
The lines are identical lines, so each of the infinite number of points on one of them is also on the other of them.
In 4 hours Cassie can make 6 bead bracelets. What is her rate per hour?
Answer:
1.5 bead bracelets per hour
Step-by-step explanation:
6 bead bracelets / 4 hours = [tex]\frac{\frac{6}{4}}{\frac{4}{4}}[/tex]=[tex]\frac{1.5}{1}[/tex]
The rate in per hour is 1.5.
What is Division method?
Division method is used to distributing a group of things into equal parts. Division is just opposite of multiplications.
For example, dividing 20 by 2 means splitting 20 into 2 equal groups of 10.
Given that;
In 4 hours Cassie can make 6 bead bracelets.
Now,
Since, 6 bead bracelets are make in 4 hours.
So, The rate per hour is calculated as;
Rate = 6/4
= 1.5
Thus, The rate in per hour is 1.5.
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HELP HELP HELP ME YOU'LL GET 50+ BRAINLIEST POINTS PLEASE HELP ME PLEASE PLEASE ANSWER CORRECTLY PLEASE
3.3 g/L = ___________ mg/mL
Answer:
g/L↔mg/mL 1 g/L = 1 mg/mL.
3.3 g/L = 3.3 mg/mL
( multiply the mass / volume value by 1 )
Sasha asked her classmates, "How many days do you exercise in a typical
week? The dot plot shows Sasha's data.
Time Spent Exercising
4
Number of days
How many observations did she record?
A. 20
B. 18
C. 7
D. 5
A random sample of 225 individuals working in a large city indicated that 45 are dissatisfied with their working conditions. Based upon this, compute a 90% confidence interval for the proportion of all individuals in this city who are dissatisfied with their working conditions. Then find the lower limit and upper limit of the 90% confidence interval.
Answer:
CI 90 % = [ 0,165 ; 0,235 ]
Lower limit 0,165
upper limit 0,235
Step-by-step explanation:
Sample information:
sample size n = 225
number of dissatisfied individuals x = 45
p = 45/225
p = 0,2 and q = 1 - p q = 1 - 0,2 q = 0,8
p*n = 0,2*225 = 45 and q*n = 0,8*225 = 180
p*n and q*n big enough to use the approximation of binomial distribution to normal distribution
90 % of Confidence Interval then a significance level is α = 10%
α = 0,1 in z table we get z(c) for that significance level
z(c) = 1,28
CI 90 % = [ p ± z(c)*√(p*q)/n ]
z(c) * √(p*q)/n = 1,28 * √ ( 0,2*0,8)/225
z(c) * √(p*q)/n = 1,28 * 0,027
z(c) * √(p*q)/n = 0,035
CI 90 % = [ 0,2 ± 0,035 ]
CI 90 % = [ 0,165 ; 0,235 ]
Lower limit 0,165
upper limit 0,235
y = 3x + 5
2y = 4x + 24
Step-by-step explanation:
what do you need explain graphing them
You may need to use the appropriate technology to answer this question.
Health insurance benefits vary by the size of the company. The sample data below show the number of companies providing health insurance for small, medium, and large companies. For purposes of this study, small companies are companies that have fewer than 100 employees. Medium-sized companies have 100 to 999 employees, and large companies have 1,000 or more employees.
The questionnaire sent to 225 employees asked whether or not the employee had health insurance and then asked the employee to indicate the size of the company.
Health Insurance Size of the Company
Small Medium Large
Yes 30 59 82
No 20 16 18
(a) Conduct a test of independence to determine whether health insurance coverage is independent of the size of the company.
State the null and alternative hypotheses.
H0: Having health insurance is not independent of the size of the company.
Ha: Having health insurance is independent of the size of the company. H0: Having health insurance is not independent of the size of the company.
Ha: The proportion of companies with health insurance benefits is not equal for small, medium and large companies. H0: Having health insurance is independent of the size of the company.
Ha: The proportion of companies with health insurance benefits is equal for small, medium and large companies.H0: Having health insurance is independent of the size of the company.
Ha: Having health insurance is not independent of the size of the company.
Find the value of the test statistic. (Round your answer to three decimal places.)
What is the p-value? (Round your answer to four decimal places.)
p-value =
Using a 0.05 level of significance, what is your conclusion?
Do not reject H0. We cannot conclude health insurance coverage and the size of the company are not independent.Do not reject H0. We cannot conclude health insurance coverage is independent of the size of the company. Reject H0. We conclude health insurance coverage is independent of the size of the company. Reject H0. We conclude health insurance coverage is not independent of the size of the company.
(b) A newspaper article indicated employees of small companies are more likely to lack health insurance coverage. Use percentages based on the above data to support this conclusion. (Round your answers to the nearest integer.)
For small companies, % do not provide health insurance. For medium companies, % do not provide health insurance. For large companies, % do not provide health insurance. These percentages support the conclusion that small companies are ---Select--- less more equally likely to provide health insurance coverage when compared to medium and large companies.
Answer:
H0: Having health insurance is independent of the size of the company.
Ha: Having health insurance is not independent of the size of the company.
χ²= 9.284
The corresponding p-value for the test is = 0.0096
Reject H0. We conclude health insurance coverage is not independent of the size of the company.
For small companies, 40% do not provide health insurance. For medium companies, 11.4% do not provide health insurance. For large companies,18 % do not provide health insurance.
These percentages support the conclusion that small companies are less more equally likely to provide health insurance coverage when compared to medium and large companies.
Step-by-step explanation:
small medium large Total
yes 30 59 82 171
no 20 16 18 54
Total: 50 75 100 225
Expected Values small medium large Total
yes { 50* 171/225} = 38 57 76 171
no 12 18 24 54
Total 50 75 100 225
Squared Distances small medium large
yes {(30 - 38)^2}/38
= 1.684 0.07 0.474
no {(20 - 12)^2} /12
= 5.333 0.22 1.5
1) The null and alternative hypotheses can be formulated as
H0: Having health insurance is independent of the size of the company.
Ha: Having health insurance is not independent of the size of the company.
(2) the significance level is alpha =0.05 ,
the number of degrees of freedom is df = (2 - 1) * (3 - 1) = 2df
so then the rejection region for this test is χ 2 :χ 2 >5.991.
3) Test Statistics under H0 is
χ²= ∑ (O - E)²/ E where O is the observed and E is the expected frequency
4) χ²= 1.684+5.333+0.07+0.222+0.474+1.5
= 9.284
Since it is observed that χ²=9.284 >χ²= 5.991 it is concluded that the null hypothesis is rejected.
5) Conclusion
It is concluded that the null hypothesis H0 is rejected. Therefore, there is not enough evidence to claim that the two variables are dependent at 0.05 significance level.
The corresponding p-value for the test is = 0.0096
b) The percentages of
Small %= 20/50= 0.4= 40%
Medium %= 16/75 = 0.786= 11.4%
Large %= 18/100= 0.18= 18%
For small companies, 40% do not provide health insurance. For medium companies, 11.4% do not provide health insurance. For large companies,18 % do not provide health insurance.
These percentages support the conclusion that small companies are less more equally likely to provide health insurance coverage when compared to medium and large companies.
