12. Solve x^2 + 6x - 16 = 0 by completing the square.

Please help and show work

x is 2 and -8

Step-by-step explanation:

general equation

sum is 6, product is -16

for completing squares,

first divide the sum by 2:

add the square of the result on (x² + 6x) and subtract it from the product:

take square root:

x is either: 5-3 or -5-3

b. 1.25 hr

step-by-step explanation:

if you have a constant speed of 60 mph, then you have a ratio between 60 mi. to 1 hr. dividing both sides by 60 we get the ratio

1 mi. to

then mult. both sides by 75 we get the ratio

75 mi. to

simplifying we get

75 mi. to

or 1.25 hr.