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Related Questions
The sum of ages of two brothers is 38.Four years ago the age of the elder brother was the square of the younger brother.Find their ages.
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Answer:
Older: 29 Younger:9
Step-by-step explanation:
First from 38, you subtract 8, 4 years for each brother and you get 30 years together. Then you find out that 25+5=30, and 5^2=25. Then you add 4 to each age to find their present day ages. Pls award brainliest for this
Please help I think I picked the wrong answer !!
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Answer:
one solution
Step-by-step explanation:
it has one solution because the slopes of the two equations(1x & 2x) are different, which means the lines of the two equations are not parallel, they have an intersection point(also means one solution).
What is the slope of this table ?
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Answer:
Slope can be found using rise/run
so y2-y1/x2-x1
PLEASE HELPPPP FAST
ILL GIVE BRAINLIEST
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Answer:
A
Step-by-step explanation:
Have a nice day
A website offers mp3 downloads for a fee of $5 plus $0.15 for each song. Which choice gives an expression that shows the cost in dollars for purchasing "s" songs? 5 +0.15s 0 0.15 + 5s 0.45s 05.15 + 5 Next > Previous NA data to save last checked at 6:41 pm Submit Quiz
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Answer:
i think 5 + 0.15
Step-by-step explanation:
The rule is “Left, Right, Left, Down.” Which way does the 19th arrow point?
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I NEED THE ANSWER AS SOON AS POSSIBLE PLS
Solve the system of equations {4x + 6y = 24
pair for its solution.
2x + y = 8 which has exactly one (x,y)
i only need number 4
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Answer:
(3,2)
You can solve this in many ways. You can solve by graphing it, addition/elimination, or by substitution
add
3×+8y-12zand5x-7y+15z
help meee
Answers
3x+5x+12z+15z+8y+7y
8x+17z+15y
Answer:
[tex]3x + 8y - 12 z + 5x - 7y + 15z \\ 8x + y + 3z[/tex]
Step-by-step explanation:
I hope this helps you
Represent the following sentence as an algebraic expression, where "a number" is the letter x. You do not need to simplify.
The sum of 7 and the cube of a number.
The sum of 7 and the cube of a number.
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Answer:
Step-by-step explanation:
7 + x³ is the sum of 7 and the cube of a number x
A new, simple test has been developed to detect a particular type of cancer. The test must be evaluated before it is used. A medical researcher selects a random sample of 1,000 adults and finds (by other means) that 2% have this type of cancer. Each of the 1,000 adults is given the test, and it is found that the test indicates cancer in 98% of those who have it and in 1% of those who do not. Based on these results, what is the probability of a randomly chosen person not having cancer given that the test indicates cancer
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Answer:
0.3333 = 33.33% probability of a randomly chosen person not having cancer given that the test indicates cancer
Step-by-step explanation:
Conditional Probability
We use the conditional probability formula to solve this question. It is
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)}[/tex]
In which
P(B|A) is the probability of event B happening, given that A happened.
[tex]P(A \cap B)[/tex] is the probability of both A and B happening.
P(A) is the probability of A happening.
In this question:
Event A: Test indicates cancer.
Event B: Person does not have cancer.
Probability of a test indicating cancer.
98% of 2%(those who have).
1% of 100 - 2 = 98%(those who do not have). So
[tex]P(A) = 0.98*0.02 + 0.01*0.98 = 0.0294[/tex]
Probability of a test indicating cancer and person not having.
1% of 98%. So
[tex]P(A \cap B) = 0.01*0.98 = 0.0098[/tex]
What is the probability of a randomly chosen person not having cancer given that the test indicates cancer?
[tex]P(B|A) = \frac{P(A \cap B)}{P(A)} = \frac{0.0098}{0.0294} = 0.3333[/tex]
0.3333 = 33.33% probability of a randomly chosen person not having cancer given that the test indicates cancer
4+j3 amps and resistance of 5-j3 ohms what is the voltage of the circuit
Answers
Answer:
V = 29 + j3
Step-by-step explanation:
4+j3 amps and resistance of 5-j3 ohms what is the voltage of the circuit
V = IR I = 4+j3 amps R = 5-j3 ohms
V = 4+j3 × 5-j3
V = [4 × 5]+[j3 × -j3] + [4 × -j3] + [j3 × 5]
V = 20 + (-j²)9 + (-j12) + j15
V = 20 - 9 + j3 j3 × -j3 = 9 not -9 j = -1 j × j = -1 not 1 my mistake
V = 11 + j3 WRONG
my daughter's old TI 84 Plus Silver Edtion calculator got 29+j3
Please help fast........
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Answer:
b
Step-by-step explanation:
Find the first 5 terms of the arithemitic sequence whose seventh term is 22 and whose eleventh term is 6.
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Answer:
The first 5 terms of the arithemitic sequence are 46, 42, 38, 34 and 30.Step-by-step explanation:
Given that:
The arithemitic sequence whose seventh term is 22 and whose eleventh term is 6.To Find:
The first 5 terms of the arithemitic sequence.We know that:
aₙ = a + (n - 1)dWhere,
aₙ = nth term a = First term n = Number of termsd = Common differenceWe have:
Seventh term = 22
⟶ a + (7 - 1)d = 22
⟶ a + 6d = 22
⟶ a = 22 - 6d
Evelenth term = 6
⟶ a + (11 - 1)d = 6
⟶ a + 10d = 6
Substituting the value of a.
⟶ 22 - 6d + 10d = 6
⟶ 22 + 4d = 6
⟶ 4d = 6 - 22
⟶ 4d = - 16
⟶ d = - 16/4
⟶ d = - 4
In equation (i).
⟶ a = 22 - 6d
Putting the value of d.
⟶ a = 22 - 6(- 4)
⟶ a = 22 + 24
⟶ a = 46
Now we have to find the first 5 terms:
a = 46a + d = 46 + (- 4) = 46 - 4 = 42a + 2d = 46 + 2(- 4) = 46 - 8 = 38a + 3d = 46 + 3(- 4) = 46 - 12 = 34a + 4d = 46 + 4(- 4) = 46 - 16 = 30Hence,
The first 5 terms of the arithemitic sequence are 46, 42, 38, 34 and 30.Click on the graph below to create a triangle with vertices at the following points.
(-5,0), (-5,9), (0,9)
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42 32 30 32 一 44 36 45 43 What is the median of this set of data?
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Answer:
the first one=0
the second one=1
When the following fraction is reduced, what will be the exponent on the m?
27mn³
_____
51m⁸n
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Answer:
a
Step-by -step explanation:
i took the test and got it right :)
What’s the answer help pls
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Geraldo has 3 fewer marbles than Yan Together, they have 21 marbles which equation
represents this situation?
21, where is the number of marbles Yan has
*+ * - $) = 21, where is the number of marbles Geraldo has
*+ (8-2) = 21, where is the number of marbles Geraldo has
*+ * -3) = 21, where a is the number of marbles Yan has
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Please answer the question question correctly with factual information for brainliest.
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Answer:
A
Step-by-step explanation:
3. Penny's family decided to go to the Splash Park.
They purchased two adult tickets and two child
tickets. The adult tickets were 1į times the price
of the child tickets and the total cost for all four
tickets was $85. What was the cost of each type
of ticket?
Answers
Answer:
21.25
Step-by-step explanation:
because 85$ divided by the 4 tickets is 21.25
person who answers first I will give 30 points needed asap
what is AoC
BoC
DoE
Answers
Answer:
First of AOD is verticallly opposite to BoC which makes it 55°
Angle at AoC is 55°+55°+105° minus 360 which is 145° hope this helps
I NEED HELP RIGHT NOW PLS!!
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Answer:
I think the answer is 2 because 2.5 x 2 = 5.
I'm sorry if this is wrong, I'm a bit unsure.
Step-by-step explanation:
Can I have brainliest? It would help me out, if not thanks anyways! Hope this helped and have a nice day!
Answer:
2
Step-by-step explanation:
we simply divide 2 1/2 from 5
5÷2 1/2
5÷5/2
5×2/5
2(we cancel five)
Find the missing length.
c=[?]
6
C
9
Pythagorean Theorem: a2 + b2 = c2
Enter
Answers
Answer:
yep
Step-by-step explanation:
mhm
Answer:
c = 10.81
Step-by-step explanation:
if it's a² + b² = c²
6² + 9² = c²
36 + 81 = c²
117 = c²
(square root both)
10.81 = c
(I think this is right)
In Texas, state law requires that for regular classroom settings in elementary grades K-4, the student-to-teacher ratio can be no more than 22:1. Schools may request a waiver to exceed this ratio. A hypothesis test is performed to determine if the proportion of schools needing such a waiver is above 25% using a random sample of 85 schools and a significance level of 5%. What conclusion should be drawn if 32 of the schools surveyed need a waiver to exceed the required student-to-teacher ratio
Answers
Answer:
Step-by-step explanation:
A hypothesis test is performed to determine if the proportion of schools needing such a waiver is above 25%
At the null hypothesis, we test that the proportion is of 25%, that is:
[tex]H_0: p = 0.25[/tex]
At the alternate hypothesis, we test that the proportion is above 25%, that is:
[tex]H_a: p > 0.25[/tex]
The test statistic is:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
In which X is the sample mean, [tex]\mu[/tex] is the value tested at the null hypothesis, [tex]\sigma[/tex] is the standard deviation and n is the size of the sample.
0.25 is tested at the null hypothesis:
This means that [tex]\mu = 0.25, \sigma = \sqrt{0.25*0.75}[/tex]
Sample of 85 schools, 32 need a waiver:
This means that [tex]n = 85, p = \frac{32}{85} = 0.3765[/tex]
Value of the test statistic:
[tex]z = \frac{X - \mu}{\frac{\sigma}{\sqrt{n}}}[/tex]
[tex]z = \frac{0.3765 - 0.25}{\frac{\sqrt{0.25*0.75}}{\sqrt{85}}}[/tex]
[tex]z = 2.69[/tex]
P-value of the test and decision:
The p-value of the test is the probability of finding a sample proportion above 0.3765, which is 1 subtracted by the p-value of z = 2.69.
Looking at the z-table, z = 2.69 has a p-value of 0.9964
1 - 0.9964 = 0.0036
The p-value of the test is 0.0036 < 0.05, thus we reject the null hypothesis that the proportion is 25%, and accept the alternate hypothesis that the proportion of schools needing such a waiver is above 25%.
MULTIPLE CHOICE QUESTION Parabola: y = x2 + 4x - 5 Which parabola will open downward when graphed? Green Red Parabola: y=-x2+x+6
Answers
Answer:
green one
Step-by-step explanation:
Given a parabola in standard form
y = ax² + bx + c ( a ≠ 0 )
• If a > 0 then the graph opens upwards
• If a < 0 then the graph opens downwards
y = - x² + x + 6 , has a = - 1 < 0
Then its graph will open downwards
Ashley owns a house with a market value of $135,000 and an assessed value of $110,000. If Cobb County's tax rate is $21.40 per $1,000 of assessed value, what is her annual tax bill?
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Answer:
Annual tax bill of Ashley = $2,354
Step-by-step explanation:
Given:
Market value of house = $135,000
Assessed value of house = $110,000
County's tax rate = $21.40 per $1,000
Find:
Annual tax bill of Ashley
Computation:
Annual tax bill of Ashley = [Assessed value of house / 1,000 ]21.40
Annual tax bill of Ashley = [110,000 / 1,000 ]21.40
Annual tax bill of Ashley = [110]21.40
Annual tax bill of Ashley = $2,354
Bert measured a swimming pool and made a scale drawing. The scale of the drawing was
1 centimeter = 1 meter. What scale factor does the drawing use?
Simplify your answer and write it as a fraction.
Submit
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Each meter is 100 centimeter
Simplify the following expression.
1/2 divided by 1/10
A. 1 whole 1/3
B. 1/20
C. 5
D. 1/5
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Answer:
I got C.)5
Step-by-step explanation:
Plsss help me, ASAP, Thank you
Answers
Answer:
[tex]\frac{1}{16}[/tex] [tex]\frac{10}{9}[/tex]
Step-by-step explanation:
a reciprocal is a number that when multiplied by a given number gives 1 as product.
16 * x = 1
x = 1/16
9/10 * x = 1
x = 10/9
Same thing with 9/10. The reciprocal of 9/10 is 10/9
Color Frequency
Blue
57
Black
84
Silver
183
Red
168
Green
64
If there were 6 times as many of each color car in the parking lot, how
many silver cars would be in the parking lot?
Answers
So there will need to be 1098 cars.
