If 4 is a solution to x^2+bx-12=0, then b=?

b = -1

Step-by-step explanation:

First plug in 4 for each x:

Then simplify by multiplying out what you can with 4:

After simplify further by combining like terms:

Then isolate b on one side by subtracting 4 from each side:

Finally isolate b further by dividing each side by 4 to get b alone and find the

4 and 5)16.97 or 12√2

6)15.59 or 9√3

7)y = 15.59 or 9√3     x =27

8)17.80