MATHEMATICS MIDDLE SCHOOL

5x-16y=272 y=(64-7x)/4

Answers

Answer 1
Answer:

Answer:

x=16, y=-12. (16, -12).

Step-by-step explanation:

5x-16y=272

y=(64-7x)/4

------------------

4y=64-7x

4y+7x=64

5x-16y=272

---------------------

4(4y+7x)=4(64)

5x-16y=272

-----------------

16y+28x=256

5x-16y=272

------------------

33x=528

x=528/33

x=16

5(16)-16y=272

80-16y=272

16y=80-272

16y=-192

y=-192/16

y=-12


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James invests $20,000 in an account that offers a compound interest rate of 8.3% per year. Which of the following is the correct equation for how much
James will have after 6 years?

Answers

Answer:

Step-by-step explanation:

Let y represents the amount James have after 6 years,

Given,

Principal amount, P = $ 20,000,

Compound rate of interest per year, r = 8.3 %,

Thus, the amount after x years would be,

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MIDDLE SCHOOL

The cozy cat shop has 3 calico cats for every gray cat .If they have 9 calico cats available , how many gray cats do they have

Answers

Answer:

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Step-by-step explanation:

Write and solve an equation of ratios:

3 calico      1 gray

------------ = ------------

9 calico           g

Cross multiplying, we get

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Answer:

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Step-by-step explanation:

MIDDLE SCHOOL

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Select one:
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B. (8,4)
C. (3,9)
D. (9,1)

Answers

The answer is D. (9,1)

Answer:

D. (9,1)

Step-by-step explanation:

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