All categories

3 years ago

Solve the system by substitution.

Mathematics

2 answers:

Elina [12.6K]3 years ago

5 0

D x= -9
Y=9
Because 4(-9)+45=9
I just put in each one and d got it right.

Evgen [1.6K]3 years ago

4 0

Y = -x
y = 4x + 45

 -x = 4x + 45
- 4x - 4x 
-5x = 45
-5 -5
 x = -9
y = 4x + 45
y = 4(-9) + 45
y = -36 + 45
y = 9
(x, y) = (-9, 9)

It is equal to B.

You might be interested in

Describe the main parts of a proof

uysha [10]

Show how you got your answer in reverse. For example... if ur question is
4+4/(?)=4
8/?=4
oh its commen sense that the answer is 2.
now show how u got the answer 2.

? is 2 because, 4 times 2 equals 8
4(2)=8

6 0

3 years ago

Hello everyone I need some serious help!

vampirchik [111]

Step-by-step explanation:

1/2 the fourth answer :)

5 0

3 years ago

Read 2 more answers

1/2x + 1/3y = 5 1/4x + y = 10

Pavel [41]

The answer for your question is (x,y)=(4,9)

8 0

3 years ago

Read 2 more answers

You have decided to invest $1000 in a savings bond that pays 4% interest, compounded semi-annually. What will the bond be worth

Evgen [1.6K]

Answer:

$2191.12

Step-by-step explanation:

We are asked to find the value of a bond after 10 years, if you invest $1000 in a savings bond that pays 4% interest, compounded semi-annually.

$FV=C_0\times (1+r)^n$ , where,

$C_0=\text{Initial amount}$ ,

r = Rate of return in decimal form.

n = Number of periods.

Since interest is compounded semi-annually, so 'n' will be 2 times 10 that is 20.

$4\%=\frac{4}{100}=0.04$

$FV=\$1,000\times (1+0.04)^{20}$

$FV=\$1,000\times (1.04)^{20}$

$FV=\$1,000\times 2.1911231430334194$

$FV=\$2191.1231430334194$

$FV\approx \$2191.12$

Therefore, the bond would be $2191.12 worth in 10 years.

3 0

3 years ago

Use the slope-intercept method to graph the equation y=2x-4. Is (3,2) a solution?

Andru [333]

Yes, (3, 2) is a solution to y = 2x - 4. (:

8 0

3 years ago

Read 2 more answers