Suppose a professor uses a normal distribution to assign grades in her math class. She assigns an A to students scoring more than 2.1 standard deviations above the mean and an F to students scoring more than 2 standard deviations below the mean. She assigns a B to students who score between 1.1 and 2.1 standard deviations above the mean and a D to students who score between 0.9 and 2 standard deviations below the mean. All other students get a C. What percent of the class receives each grade assuming the scores are normally distributed?

option 3 . (5x + 1) - (-10x + 6)

step-by-step explanation:

option 1 :

(4x + 3) + (-9x + 4)

or 4x+3 -9x + 4

or -5x + 7

option 2

(x - 2) - (6x - 9)

or x-2-6x + 9

or -5x + 7

option 3

(5x+ + 6)

or 5x + 1 + 10x -6

or 15x -5

option 4

-4x+2x+7-3x

-7x + 2x + 7

-5x + 7

hence only option 3 did   not satisfy the given simplify expression.

- (2, -7)

- lines r and s and lines t and u must be parallel

what are you doing do you need examples of variable questions?

step-by-step explanation:

5a-1=9               bring the one over the =

5a=10                     divide by your variable

a=2

brainliest? ?

here try this one

3a-24=0