Sam thinks that his MP2 average grade will be an 80. He received the following scores: 90, 80, 75, 90, 85. Is he correct? Explain. Silly questions and Links will be reported.
Marking brainliest and its a 20 point question

FR , kgf, tkf

8.4

Step-by-step explanation

or

step-by-step explanation:

we need to solve for 'x' the following equation:  

we have that:

⇒

⇒ ⇒

factorizing, we get that:

  ⇒

then, the solutions are: or

nothing extraneous has been found!