Y=3.2x+5 what is the answer for y

Step-by-step explanation:

Y = 3.2x + 5 is a linear function with slope 3.2 and y-intercept 5.

For any x value you choose to substitute for x, you'll obtain a unique y value.  For example, if we were to substitute -3 for x, we'd get:

f(-3) = y = 3.2(-3) + 5, or y = -9.6 + 5 = -4.6

There is only one y result for each choice of x.  

Y=3.2x+5 alone does not have an "answer."  Again:  You must pick your own x values and for each such value you must calculate y.

(x+3)(x+7)

step-by-step explanation:

2(2x + 3) = -4 + 2(2x + 5)

4x + 6 = -4 + 4x + 10

4x + 6 = 4x + 6

4x - 6 + 6 = 4x - 6 + 6

4x = 4x

x = x

unlimited solutions.