Answer:
$210
Step-by-step explanation:
Say you were to write it as a function. F(x)=30<em>x</em>
all you have to do is fill in for <em>x</em>
30 times 7 = 210
This problem can be expressed through the equation:
x+3x+10= 90
To solve it we subtract 10 on both sides
→x+3x=80
Add x and 3x
→4x=80
And divide each side by 4
→x=80/4
→x=20
ANSWER:
20
The slope is 3, so if x changes by 2, y changes by 6.
