Complete the square for 3x^2-6x=21. leave your answer in the form =

(x - 1)² = 8

Step-by-step explanation:

3x² - 6x = 21

÷3   ÷3   ÷3

 x² - 2x = 7

x² - 2x + ___ = 7 + ___

     ↓         ↑              ↑

x² - 2x + 1 = 7 + 1

    (x - 1)²     =  8

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

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.