Please awnser i need help on thissss

Sindrei [870]

$\left \{ {{a - 3b = 16} \atop {a = b - 2}} \right. \\ \\ \left \{ {{a = 16 + 3b} \atop { 16 + 3b = b - 2}} \right. \\ \\ \left \{ {{a = 16 + 3b} \atop {3b - b = - 2 - 16}} \right. \\ \\ \left \{ {{a =16 + 3b} \atop {2b = -18}} \right. \\ \\ \left \{ {{a=16 + 3b} \atop {b=-9}} \right. \\ \\ \left \{ {{a=16 + 3b = 16 + 3*(-9) = 16 - 27 = -11} \atop {b=-9}} \right.$

Answer a = -11, b = -9

8 0

3 years ago

A certain college graduate borrows 5510 dollars to buy a car. The lender charges interest at an annual rate of 17%. Assuming tha

Diano4ka-milaya [45]

Answer:

His annual payment rate required to pay off the loan in 7 years is $k = $2362.41$ a year.

He has to pay $11026.85 in interest

Step-by-step explanation:

The first step to solve this problem is find how much the student will have to pay for the car. So, we have to find how much the present value of the car(in $) will be worth in 7 years. This is a compound interest problem:

The compound interest formula is given by:

$A = P(1 + \frac{r}{n})^{nt}$

Where A is the amount of money, P is the principal(the initial sum of money), r is the interest rate(as a decimal value), n is the number of times that interest is compounded per unit t and t is the time the money is invested or borrowed for.

In this exercise, we have:

A = The value we want to find

P = The initial value = 5510

r = 0.17

n = 1

t = 7

So

$A = 5510(1 + \frac{0.17}{1})^{7}$

$A = $16536.85$

In a seven year period, he has to pay $16536.85. Per year, he has to pay a rate k of:

$k = \frac{16536.85}{7} = $2362.41$

His annual payment rate required to pay off the loan in 7 years is $k = $2362.41$

How much does he pay in interest?

His loan is $5510 and he has to pay $16536.85. So, in interest, he has to pay $16536.85 - 5510 = $11026.85$

5 0

3 years ago

A model of a skyscraper uses the scale of 2 inches = 45 feet. If the actual skyscraper is 992 feet tall, how tall is the model?

kvasek [131]

Answer:

44.08 or 44.1

Step-by-step explanation:

OK so the basics of this question is that for every 45 feet of the actual skyscraper we have 2 inches in the model. The first thing we do is divide 992/45 which equals 22.04. Know if this was 1 inch for every 45 feet we would be done however we need to multiply this number by 2 to get our answer so 22.04*2 =44.08

8 0

3 years ago

Twenty-seven is 25% of

DENIUS [597]

Well...

27 = 25% (1/4) × a

27 = 1/4a

a = 27 x 4 = 108

answer: 108

5 0

3 years ago

Read 2 more answers

A carousel with a 40-foot radius makes 2 rpms. What is the linear speed of the carousel?

elena-s [515]

I believe its

40*2*1/2*pi meters per second

which is just

<h2><u><em>40pi meters per second</em></u></h2>

if you need it simplified, its

<h2><u><em>125.66370meters per second</em></u></h2>

7 0

2 years ago