To get a b in math, alexandria pappas must average 80 on five tests. scores on the first four tests were 84 , 78 , 82 , and 79 . what is the lowest score that she can get on the last test and still get a b?

The formula for averaging things is (a+b+c+d)/4 (because there are 4 items being added.)

So we want the average to be 80, so we set things equal to 80.

Let the score for the unknown test score be x.

80 = (84+78+82+79+x)/5

400 = 84+78+82+79+x

x = 77

The lowest possible score Alexandria can get is 77 points.

b. y = 4x - 2

step-by-step explanation:

to find a parallel equation to an equation, make sure both equations have the same slope but different y-intercepts.

y = 4x + 1

4 = slope

1 = y-intercept

y = 4x - 2

4 = slope

-2 = y-intercept

they both have the same slope but different y-intercepts, so, b. is the correct answer.

and to check your work, you can graph both equations. : )