Mathematics: Grover has scores of 72, 86, and 78 on 3 tests. what score must he make on the next test in order to have an average of 80?

Grover has scores of 72, 86, and 78 on 3 tests. what - id72867832850606, rileybantaos1c8s

Ответ:

mikk33

05.01.2022

Let x = the next score

If (72 + 86 + 78 + x) ÷ 4 = 80

⇒ 236 + x = (80 × 4)

⇒ 236 + x = 320

⇒ x = 320 - 236
= 84

∴ he needs to get 84 on the next test to get an 80 average

0,0(0 оценок)

Ответ:

drice517

28.11.2020

Mathematics

The profit is maximum when x = 40.

Step-by-step explanation:

Cost function, C = 40 x + 300

Revenue function, R = 80 x - 0.5 x^2

The profit function is

$P = R - C\\\\P = 80 x - 0.5 x^2 - 40 x - 300\\\\P = - 0.5 x^2 + 40 x - 300\\\\\frac{dP}{dx} = - x + 40\\\\So, \frac{dP}{dx} = 0\\\\-x + 40 = 0 \\\\x = 40$

So, the profit is maximum when x = 40 .

0,0(0 оценок)

Grover has scores of 72, 86, and 78 on 3 tests. what score must he make on the next test in order to have an average of 80?

Ответ:

Ответ:

Ask your question to the AI advisor

More tips

Answers on questions: Mathematics

Ask an AI advisor a question