A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have

Question

Bogdan [553]

3 years ago

8

A student has gotten the following grades on his tests. What is the minimum grade he must get on the last test in order to have

an average of 82? 85, 90, 79, 72

Mathematics

2 answers:

Stolb23 [73] · Answer 1 · 2021-12-14T05:52:25+03:00

Answer:

84

Step-by-step explanation:

Because average is basically the mean, so i used a mean calculator and put in the four grades (numbers) and got an average of 81.5, so then i kept putting an additional other number in and wasn't getting 82, until i put in 84 and all of those numbers together gave me an average of 82.

valentina_108 [34] · Answer 2 · 2021-12-14T04:10:36+03:00

Answer:

84

Step-by-step explanation:

The average is found by adding all the scores together and dividing by the number of scores

Let the unknown score be x

(85+90+79+72+x) /5 = 82

Multiply each side by 5

(85+90+79+72+x) /5*5 = 82*5

(85+90+79+72+x) = 410

Combine like terms

326+x = 410

Subtract 326 from each side

326+x-326 = 410 -326

x =84