SOLUTION: Question #1- Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4). Question #2- Rewrite the equation 2x – 9y = –72 as a function of x. Question #

Algebra ->  Linear-equations -> SOLUTION: Question #1- Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4). Question #2- Rewrite the equation 2x – 9y = –72 as a function of x. Question #      Log On


   

Question 104436: Question #1- Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4).
Question #2- Rewrite the equation 2x – 9y = –72 as a function of x.
Question #3- Given y = 5x2 (5x2this is 5x squared) , find y when x = –2.
Answer by tutorcecilia(2152) About Me  (Show Source):
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Question #1- Write the equation of the line with x-intercept (12, 0) and y-intercept (0, 4).
Slope = m=%28%280-4%29%2F%2812-0%29%29=%28-4%2F12%29=%28-1%2F3%29
.
Use y=mx+b
0=%28%28-1%2F3%29%2812%29%2Bb%29
0=%28-12%2F3%29%2Bb%29
0=4-+b
4=b
So,
y=%28-1%2F3%29x%2B4%29
.
.
Question #2- Rewrite the equation 2x – 9y = –72 as a function of x.
2x-9y+9y=-72-9y
2x=-9y-72
2x/2=-9y/2-72/2
x=%28%28-9%2F2%29y-36%29
.
.
Question #3- Given y = 5x2 (5x2this is 5x squared) , find y when x = –2.
y=%285x%5E2%29
y=%285%28-2%29%5E2%29
y=(5)(4)
y=20