Question

Find the value of 9x + 4y, when x = 4 and y = -3.

Again, For my homework kinda stuck on it

Thanks

Answer 1

Answer:

In the point (-1, ?), -1 is an x-value and we need to find the y-value.

9x + 4y - 4 = 0

Putting in the x-value of -1, we get:

9(-1) + 4y - 4 = 0

Simplifying:

-9 + 4y - 4 = 0

Combining the -9 and the -4:

4y - 13 = 0

Getting rid of the -13 by adding 13 to both sides:

4y - 13 + 13 = 0 + 13

4y = 13

Dividing both sides by 4:

y = 13/4

Checking: Is 9(-1) +4(13/4) -4 really zero? Yes!

Answer 2

the answer is _14...

hope it will help you