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valina [46]
4 years ago
5

The grade received on a certain teacher's 100-point test varies in direct proportion to the amount of time a student spends prep

aring for the test. If a student receives 72 points on a test for which she spent 3 hours preparing, what score would she receive on the next test if she spent 4 hours preparing?
Mathematics
1 answer:
V125BC [204]4 years ago
8 0

Answer:

The teacher woll award the student 96 points for studying for 4 hours

Step-by-step explanation:

The student receives 72 point for preparing a test as long as 3 hours.

If she prepares for another test for 4 hours.

3 hours= 72 points

4 hours=( 72*4)/3

4 hours=72/3 *4

4 hours = 24*4

4 hours= 96 points

The teacher woll award the student 96 points for studying for 4 hours

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4 years ago
Which equation is the inverse of y = 100 – x2?<br> A.y= +or- sqrt 100-x A. is the correct answer
GREYUIT [131]
I hope this helps you



100-y=x^2.


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4 0
3 years ago
Roy is 11 years old and his uncle is 59 years old.how many years ago was roy ,s uncle 7 times as old as roy.
adoni [48]

59-x=7(11-x)=59 yrs

59-x=77-7x

-x+7x-77-59

6x=18

x=18^6=3

so 3 years ago uncle's age is 7 times of Roy's age.


4 0
3 years ago
Mark invests $8,008 in a retirement account with a fixed annual interest rate of 2% compounded 6 times per year. What will the a
love history [14]

Given:

Principal value = $8,008

Rate of interest = 2% compounded 6 times per year.

Time = 16 years

To find:

The account balance after 16 years.

Solution:

The formula for amount is:

A=P\left(1+\dfrac{r}{n}\right)^{nt}

Where, P is principal, r is the rate of interest, n is the number of times interest compounded in an year and t is the number of years.

Putting P=8,008, r=0.02,n=6,t=16 in the above formula, we get

A=8008\left(1+\dfrac{0.02}{6}\right)^{6(16)}

A=8008\left(\dfrac{6.02}{6}\right)^{96}

A=11022.1721148

A\approx 11022.17

Therefore, the account balance after 16 years is $11022.17.

4 0
3 years ago
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