Theresa earned scores of 88 points, 84 points, 88 points, and 91 points on four tests. what is the lowest score she can get on the fifth test and still finish with an average score of 90 points?

96 points
97 points
98 points
99 points

Find the lowest score for the average. Let that number = x

There are 5 tests in all

(88 + 84 + 88 + 91 + x)/5 = 90

First, multiply 5 to both sides

(88 + 84 + 88 + 91 + x)/5(5) = 90(5)

88 + 84 + 88 + 91 + x = 450

Next, Combine like terms

351 + x = 450

Next, isolate the x. Subtract 351 from both sides

351 (-351) + x = 450 (-351)

x = 450 - 351

x = 99

99 is your answer

hope this helps

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation:

yes   because as the functions are graphed they eventually will intersect unless otherwise

step-by-step explanation: