Plug 4x=9 in for y:
10x=18-2(4x+9)
10x=18-8x-18
10x=-8x
18x=0
x=0

now plug 0 in for x:
y=4(0)+9
y=9

to check, plug x and y back into one of the equations to make sure they are right:

10(0)=18-2(9)
0=18-2*9
0=18-18
0=0

7 0

4 years ago

Help pls asap!! No links.

algol [13]

Answer:

Step-by-step explanation:

1. Do what is inside the parantheses

$4^{2} +3+2\\16+3+2 = 21$

$7^{2} +3(21)$

2. Simplify both terms

$7^{2} =49\\3(21) = 63\\49+63$

3. Solve

$49+63 = 112$

7 0

2 years ago

Read 2 more answers

Write two decimals that are equivalent to 8.1

natta225 [31]

8.10 and 8.100 because its about significant figures. There can be an infinite number of zeros after the 1.

4 0

3 years ago