[Please help with this question and please explain.

Step-by-step explanation:

this is a linear equation ( y = mx + b)

m = the rate at which it increases

b = the amount they start with

x = the number of correct answers

so the equation is y = 3x + 2

to find y, you just plug in x

ex:

when x = 3

y = 3(3) + 2

y = 9 + 2

y = 11

to find the x value when you have a y value you plug in the y to solve for x

ex:

when y = 29

29 = 3x + 2

27 = 3x

x = 27/3

x = 9

D. 100.

Step-by-step explanation:

-m + 0.02 + 2.1m = -1.45 -4.81m

Multiply by 100:

-100m + 2 + 210m = -145 - 481m

​