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4 years ago

PLEASE HELP ASAP 50 POINTS AND BRAINLYEST

Mathematics

1 answer:

Ludmilka [50]4 years ago

5 0

Answer:

Either x = 3, y = 2

(3,2) is your answer.

Step-by-step explanation:

2x +y = 8 (1)

y = - x+ 5 (2)

Put equation (2) into equation (1). Use the y value in (2) to go into the y value in (1).

2x - x+5 = 8 Combine the x values

x + 5 = 8 Subtract 5 from both sides

x + 5-5 = 8-5

x=3

Now go back to (2). Put x in for the value of -x. Watch the sign.

y = -3+ 5

y = 2

So the answer is (3,2)

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miv72 [106K]

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4 years ago

Joe is taking out a five year loan with a 7% interest rate compounded quarterly to buy a $4000 car. What will he have paid in to

Sergio [31]

Answer:

$5659.11

Step-by-step explanation:

We are given;

Time of loan maturity is 5 years
Rate of compound interest is 7% compounded quarterly
Principal amount of the car is $4000

We are required to determine the total amount he paid at the end of 5 years..

The concept being tested is compound interest;

We are going to use the compound interest formula;

Amount = P(1+r/100)^n

Where P is the the principal amount

r is the rate of interest

n is the interest periods

In this case;

n = (5 × 4) = 20

r = 7 ÷ 4 = 1.75 ( as the money was compounded quarterly)

Thus;

Amount =$ 4000 ( 1 + 1.75)^20

= $4000 (1.0175)^20

= $5659.11

Therefore, the money that Joe will have paid at the end of 5 years is $5659.11

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