Robin solved a quadratic equation using the process shown. 2
0
- 2x +7
-(-2) + (-2)
|-2)-40530
X
2= 74-7
1
2
4+27-11
4 = 21/11
Complete the explanation of her mistake.
It should be (select) 4, because
When Robin squared the value of b, she said that (-2)2 =
-2.-2= The correct answer should be 421

the answer is the third / last answer

step-by-step explanation:

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.

do your own work and don"t cheat.

step-by-step explanation: