Answer:
I dont see numbers of a function
Step-by-step explanation:
Tell me what 86 divided by 1204 = ?
Answer:
14
Step-by-step explanation:
1204/86 (divide by 2)
602/43 ( divide by 43)
14
A 6-ft-tall person walks away from a 11-ft lamppost at a constant rate of 3.3 ft/sec. What is the rate that the tip of the person's shadow moves away from the lamppost when the person is 10 ft away from the lampost
This question is not correctly written
Complete Question
A 6-ft-tall person walks away from a 11-ft lamppost at a constant rate of 3.3 ft/sec. What is the rate that the tip of the person's shadow moves away from the lamppost when the person is 11 ft away from the lampost?
Answer:
7.26ft/s
Step-by-step explanation:
A 6-ft-tall person walks away from a 11-ft lamppost at a constant rate of 3.3 ft/sec. What is the rate that the tip of the person's shadow moves away from the lamppost when the person is 11 ft away from the lampost?
Let x = distance of person to the tip of the lamp post
= 6/x = 11/d
Cross Multiply
6d = 11 x....... Equation 1
The constant rate of the person = 3.3 ft/s
= Distance of the person to the pole = Speed × time
= 3.3 × t
d = 3.3t
x = d - 3.3t
Substitute d - 3.3t for x in Equation 1
6d = 11x
6d = 11(d - 3.3t)
6d = 11d - 36.3t
36.3t = 11d - 6d
36.3t = 5d
d = 36.3/5
d = 7.26 ft/s
What is the range of h(x)?
Given the linear function x+4y=3, state the slope of the line perpendicular to the given line.
An investigator computes a 95% confidence interval for a population mean on the basis of a sample of size 65. If she wishes to compute a 95% confidence interval that is half as wide, how large a sample does she need
Answer:
The value is [tex]n_2 = 260[/tex]
Step-by-step explanation:
From the question we are told the confidence level is 95% , hence the level of significance is
[tex]\alpha = (100 - 95 ) \%[/tex]
=> [tex]\alpha = 0.05[/tex]
Generally from the normal distribution table the critical value of [tex]\frac{\alpha }{2}[/tex] is
[tex]Z_{\frac{\alpha }{2} } = 1.96[/tex]
Generally the width of a confidence interval is dependent on the margin of error which is mathematically represented as
[tex]E = Z_{\frac{\alpha }{2} } * \frac{ \sigma}{\sqrt{n} }[/tex]
Here [tex]\sigma[/tex] is the standard deviation
Let assume that [tex]\sigma[/tex] and [tex]Z_{\frac{\alpha }{2} } [/tex] are constant for the width of the confidence interval when the sample size is n =65 and now that it has been divided to two
=> [tex]E = \frac{ K }{\sqrt{n} }[/tex]
Here K is a constant
=> [tex]E * \sqrt{n} = K[/tex]
=> [tex]E_1 * \sqrt{n}_1 = E_2 * \sqrt{n}_2[/tex]
Now let [tex]E_1 \ and \ n_1[/tex] be the margin of error and sample size before the reduction
So [tex]n_1 = 65[/tex]
and let [tex]E_2 \ and \ n_2[/tex] be the margin of error and sample size after the reduction
So [tex]E_2 = \frac{1}{2} E_1[/tex]
=> [tex]E_1 * \sqrt{65} = \frac{E_1}{2} * \sqrt{n}_2[/tex]
=> [tex]\sqrt{65} = \frac{1}{2} * \sqrt{n}_2[/tex]
=> [tex]n_2 = 260[/tex]
What is the slope of 1/2 and 7/5
Answer:
0.5
Step-by-step explanation:
its hard to explian how to do it but you can find a video im sure
Devante invests $4000 in two different accounts. The first account paid 6 %, the second account paid 11 % in interest. At the end of the first year he had earned $320 in interest. How much was in each account?
$
at 6 %
$
at 11 %
Answer:
y=1600
x=2400
Step-by-step explanation:
x+y=4000
solve for a variable
x=4000-y
plug this into .06x+.11y=320 (the interest from account 1 + account 2 must equal 320)
.06(4000-y)+.11y=320
240-.06y+.11y=320
minus 240 both sides
-.06y+.11y=80
combine terms
.05y=80
divide by .05
y=1600
to find x you subtract 1600 from 4000 to get 2400
remember, your equation must be x+y=4000
x+1600=4000
-1600
x=2400
Twice the difference of 9 and a number.
Answer:
its something like 9-n x 2
Step-by-step explanation:
9 - n x 2
Answer: 2(x-9)
Step-by-step explanation:
trust me ;)
Scores on the Critical Reading part of the SAT exam in a recent year were roughly Normal with mean 495 and standard deviation 118. You choose an SRS of 100 students and average their SAT Critical Reading scores. The sampling distribution of the average score X-bar is
Answer: sample mean = 495
Step-by-step explanation:
Given that :
Population mean = 495
Population standard deviation = 118
Sample size = 100
The sample mean according to the central limit theorem will be the same as the population mean ; According to the central limit theorem, the sample mean converges to the population mean as the sample size becomes larger, according to the theorem, usually once the SAMPLE size is greater than 30.
Here, the sample size is 100, Hence, the sample mean, will be equal to the population mean.
Sampling distribution of average score = 495 = population mean
Luke and Liam found an old castle on a recent hike.
15°
125
The sign said the tower was 30 meters high. Because of social distancing, Luke and Liam stood
meters apart while looking at the top of the castle tower.
Round to the nearest meter.
Answer:
48 meters
Step-by-step explanation:
First, use trigonometric ratios formula to find the distance of each of them from the tower. The difference between their distance from the tower will give you the distance they stood apart from each other.
Distance of the first person from the Tower with am angle of elevation of 25°:
Height of the tower = 30 meters (opposite side)
Distance from the tower = x (adjacent side)
[tex] tan(25) = \frac{opp}{adjacent} [/tex]
[tex] tan(25) = \frac{30}{x} [/tex]
Multiply both sides by x
[tex] tan(25)*x = 30 [/tex]
Divide both sides by tan(25)
[tex] x = \frac{30}{tan(25)} [/tex]
[tex] x = 64 m [/tex] (nearest whole number)
Distance of the second person from the Tower with am angle of elevation of 15°:
Height of the tower = 30 meters (opposite side)
Distance from the tower = x (adjacent side)
[tex] tan(15) = \frac{opp}{adjacent} [/tex]
[tex] tan(15) = \frac{30}{x} [/tex]
Multiply both sides by x
[tex] tan(15)*x = 30 [/tex]
Divide both sides by tan(15)
[tex] x = \frac{30}{tan(15)} [/tex]
[tex] x = 112 m [/tex] (nearest whole number)
Distance between both of them = 112 - 64 = 48 meters
How many 4 digit numbers are NOT divisible by 100?
Answer:
If you're only counting positive numbers then there are 8,900 four-digit numbers that are not divisible by 100, but if you also include negative numbers then your answer would be 17,800.
Jarrett needs supplies for school. His mother gave him a $15.00 gift card. He purchased a package of pencils for $3.36, a notebook for $4.99 and 2 pens that cost $1.49 each. How much money does Jarrett have left on the gift card?
Answer:there is $3.67 left.
Step-by-step explanation: good luck on your assignment! :)
what is -x-2
Please help me!
Answer:
I think that it might be a type-o on the assignment. If I was you I would email your teacher.
PLEASE HELP ME ILL MARK BRAINLIEST
Answer:
a. R(t) = 2t - 500
b. D(t) = 400 + 10t
c. T(t) = 400 + 10t + 2t -500
Step-by-step explanation:
donations: $400; every person costs: $10; raffle ticket: $2; winner: $500
a. R(t) = 2t - 500
2t is the raffle tickets. t represents each person. -500 represents the money that the school loses for giving away the money to the winner.
b. D(t) = 400 + 10t
400 is the pre-donation that they had. 10t is the fee for entering the dinner per person. t represents each person.
c. T(t) represents all the money the school will gain (and lose) from the fundraiser. This stands to reason that T(t) is a combination of R(t) and D(t) since R(t) is the raffle and D(t) is the donations and dinner.
T(t) = 400 + 10t + 2t -500
Hope this helps!
Please help will put brainliest
Answer:
5x−2y=−5, Eqn (1). y−5x=3, Eqn (2). y
Step-by-step explanation:
whats the GCF of 30 and 24?
the greatest common factor is 6
1 point) For each problem, select the best response. (a) A phenomenon is observed many, many times under identical conditions. The proportion of times a particular event occurs is recorded. This proportion represents A. the variance of the event. B. the distribution of the event. C. the probability of the event. D. the correlation of the event. (b) The collection of all possible outcomes of a random phenomenon is called A. the sample space. B. the distribution. C. the probability. D. a census. E. None of the above.
Answer:
For question 1, the correct answer is option C
For question 2, the correct answer is option B
Step-by-step explanation:
Problem A
A phenomenon is observed many times, under identical conditions. The proportion of times a particular event occurs is referred to as the probability of the event.
The correct option is C
* Use the instance of the tossing of a coin. The phenomenon that is observed here could be "the face of the coin that shows up after each toss". The number of times this is observed is = number of times the coin is tossed. The phrase "Under identical conditions" would mean that the coin is tossed in an identical manner e.g. 6feet high each time. The proportion of times a particular event (either HEAD showing up or TAIL showing up) occurs is the probability of that event's occurrence!
Problem B
The collection of all possible outcomes of a random phenomenon (in a given experiment) is called the distribution of the random phenomenon.
The correct option is B
which of the symbols correctly relates the two numbers below check all that apply
45 ? 45 is A. ≤( is less than or equal to), C. ≥(is greater than or equal to), E. = (is equal to) .
What are inequalities and their types?Inequality is a relation that compares two numbers or other mathematical expressions in an unequal way.
The symbol a < b indicates that a is smaller than b.
When a > b is used, it indicates that a is bigger than b.
a is less than or equal to b when a notation like a ≤ b.
a is bigger or equal value of an is indicated by the notation a ≥ b.
Given, 45? 45.
45 ? 45 is equal to 45.
45 ? 45 is greater than or equal to 45.
45 ? 45 is less than or equal to 45.
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Finding the quotient
Whats 2/7÷8/9?
Answer:
[tex]\frac{9}{28}[/tex]
Step-by-step explanation:
Given expression:
Find the quotient;
= [tex]\frac{2}{7}[/tex] ÷ [tex]\frac{8}{9}[/tex]
Now, let us solve the problem;
the division sign will invert [tex]\frac{8}{9}[/tex];
= [tex]\frac{2}{7}[/tex] x [tex]\frac{9}{8}[/tex]
2 will go in 8
= [tex]\frac{1}{7}[/tex] x [tex]\frac{9}{4}[/tex]
= [tex]\frac{9}{28}[/tex]
What is 1 divided by3/4
Answer:
3/4
Step-by-step explanation:
it is 3/4 anything dividing one is itself
Help me please asap.
Answer:
-2,0
Step-by-step explanation:
Solve equation [2] for the variable x
[2] 3x = 2y - 6
[2] x = 2y/3 - 2
Plug this in for variable x in equation [1]
[1] 5•(2y/3-2) + 6y = -10
[1] 28y/3 = 0
[1] 28y = 0
Solve equation [1] for the variable y
[1] 28y = 0
[1] y = 0
By now we know this much :
x = 2y/3-2
y = 0
Use the y value to solve for x
x = (2/3)(-0/18062600)-2 = -2
Tanya has 44 quarters and dimes worth$8.30. how many of each type of coin does she have
Tanya has 26 quarters and 18 dimes.
Given that Tanya has 44 quarters and dimes which worth $8.30, we need to find the number of each coin type,
To find the same we will use the concept of system of Linear equations,
Let's solve this problem step by step.
Let's assume Tanya has x quarters and y dimes.
The value of x quarters is 25x cents.
The value of y dimes is 10y cents.
According to the given information, the total value of the quarters and dimes is $8.30, which is equivalent to 830 cents. So we have the equation:
25x + 10y = 830 ...........(Equation 1)
Tanya has 44 coins in total:
x + y = 44 ...........(Equation 2)
Now, we can solve this system of equations (Equation 1 and Equation 2) to find the values of x and y.
Multiplying Equation 2 by 25, we get:
25x + 25y = 1100 ...........(Equation 3)
Subtracting Equation 3 from Equation 1, we eliminate the x term:
25x + 10y - (25x + 25y) = 830 - 1100
-15y = -270
Dividing both sides by -15, we get:
y = (-270)/(-15) = 18
Substituting the value of y back into Equation 2, we can find x:
x + 18 = 44
x = 44 - 18 = 26
Therefore, Tanya has 26 quarters and 18 dimes.
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The length of a rectangle is 3 m more than 5 times the width. The perimeter is 126
m.
What is the length?
Answer:
53m
Step-by-step explanation:
Let x = the width
Let y = the length
5x + 3 = y
2x + 2y = 126
Plug in 5x + 3 for y in the second equation
2x + 2(5x + 3) = 126
Distribute the 2
2x + 10x + 6 = 126
Combine like terms
12x + 6 = 126
Subtract 6 from both sides
12x = 120
Divide both sides by 12
[tex] \frac{12x}{12} = \frac{120}{12} [/tex]
x = 10
Remember x = width. You are looking for length.
y = 5x + 3
y = 5(10) + 3
y = 50 + 3
y = 53
A student is asked to calculate the value of 133 using the identity (x + y)3 = x3 + 3x2y + 3xy3 + y3. The student's steps are shown below.
Step 1: 133 = (10 + 3)3
Step 2: = (10)3 + 3(10)2(3) + 3(10)(3)2 + (3)3
Step 3: = (1,000) + (180) + (270) + (27)
Step 4: = 1,477
The correct answer should be 2,197. In which step did the student make his first error?
Answer:
Step 1.
Step-by-step explanation:
You can't multiply sum of 2 random digits to the power of 3.
Westside Middle School sell raffle tickets as a fundraiser the tickets were priced at 5 for $20 how many tickets did school sale is it broughtin a profit of 2500?
Answer:
$12.500
Step-by-step explanation:
How fast is employment for Mathematicians expected to grow
between 2016 and 2026?
O 30 percent
O 17 percent
O 28 percent
O 34 percent
Answer:
A
Step-by-step explanation:
Answer:
It's A 30%
Step-by-step explanation:
Which graph shows a dilation?
Answer:
Step-by-step explanation:
There is no graph.
Determine the intercepts of the line.
- 4x + 7 = 2y - 3?
Answer:
x-intercept(s):(5/2,0)
y-intercept(s): (0,5)
Step-by-step explanation: i think thats right idk
Answer:
the y intercept is (0,5) and the x intercept is ( 2.5,0)
Step-by-step explanation:
I know this because khan academy gave me the answer
its not 5/2 or 2/5 for the x intercept
List the coordinates of the vertices of trapezoid ABCD after it has been rotated 90° counterclockwise about the origin and then reflected over the x-axis. A(−5,−3)B(−4,0)C(−2,0)D(0,−3)
Answer:
d
Step-by-step explanation:
thats the answer
Then the new coordinate after transformation will be A''(3, 5), B''(0, 4), C''(0, 2), and D''(3, 0). Then the correct option is D.
What is a transformation of a shape?A point, line, or geometric figure can be transformed in one of four ways, each of which affects the structure and/or location of the object. From before the refers to the object's initial condition, and Picture, after transformation, refers to the object's ultimate structure and location.
Rotation does not change the shape and size of the geometry. But changes the orientation of the geometry.
The coordinates of the vertices of trapezoid ABCD after it has been rotated 90° counterclockwise about the origin and then reflected over the x-axis. A(−5,−3), B(−4,0), C(−2,0), and D(0,−3).
Then the new coordinate after transformation will be A''(3, 5), B''(0, 4), C''(0, 2), and D''(3, 0). Then the correct option is D.
The diagram is attached below.
More about the transformation of the shape link is given below.
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This week a very large running race 5K occurred in Denver the times were normally distributed with a mean of 23.92 minutes and the standard deviation of 3.4 minutes what time in minutes is the cut off for the fastest 51.99% and what percent of runners took more than 32.128 minutes to complete the race
Answer:
a) 24.09 minutes
b) 0.8%
Step-by-step explanation:
This week a very large running race 5K occurred in Denver the times were normally distributed with a mean of 23.92 minutes and the standard deviation of 3.4 minutes what time in minutes is the cut off for the fastest 51.99%
Z score for 51.99% = 0.05
z = (x-μ)/σ,
where x is the raw score = ? minutes
μ is the population mean = 23.92 minutes
σ is the population standard deviation = 3.4 minutes
0.05 = x - 23.92/3.4
Cross Multiply
0.05 × 3.4= x - 23.92
0.17 = x - 23.92
0.17 + 23.92 = x
x = 24.09 minutes
What percent of runners took more than 32.128 minutes to complete the race
= z score
z = (x-μ)/σ,
where x is the raw score = 32.128 minutes
μ is the population mean = 23.92 minutes
σ is the population standard deviation = 3.4 minutes
z = 32.128 - 23.92/3.4
z = 2.41412
P-value from Z-Table:
P(x<32.128) = 0.99211
P(x>32.128) = 1 - P(x<32.128) = 0.0078867
Approximately =0.008
Converting to percentage = 0.008 × 100
= 0.8%
Using the normal distribution, it is found that:
The cut off for the fastest 51.99% of times is of 24.09 minutes.0.25% of runners took more than 32.128 minutes to complete the race.Normal Probability DistributionIn a normal distribution with mean [tex]\mu[/tex] and standard deviation [tex]\sigma[/tex], the z-score of a measure X is given by:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
It measures how many standard deviations the measure is from the mean. After finding the z-score, we look at the z-score table and find the p-value associated with this z-score, which is the percentile of X.In this problem, we have that the mean and the standard deviation are, respectively, [tex]\mu = 23.92, \sigma = 3.4[/tex].
The cut off for the fastest 51.99% is the lowest 51.99% of times, that is, the 51.99th percentile, which is X when Z = 0.05.
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]0.05 = \frac{X - 23.92}{3.4}[/tex]
[tex]X - 23.92 = 0.05(3.4)[/tex]
[tex]X = 24.09[/tex]
The cut off for the fastest 51.99% of times is of 24.09 minutes.
The proportion of runners who took more than 32.128 minutes to complete the race is 1 subtracted by the p-value of Z when X = 32.128, hence:
[tex]Z = \frac{X - \mu}{\sigma}[/tex]
[tex]Z = \frac{32.198 - 23.92}{3.4}[/tex]
[tex]Z = 2.43[/tex]
[tex]Z = 2.43[/tex] has a p-value of 0.9925.
1 - 0.9925 = 0.0025.
0.0025 = 0.25% of runners took more than 32.128 minutes to complete the race.
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