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3 years ago

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In a group of five students who took the same test, four of the scores were 85, 92, 81, and 95. If the average of the five stude

nts was 89, what was the score of the fifth student?

1 answer:

dangina [55]3 years ago

7 0

Answer:

92

Step-by-step explanation:

89 x 5 = 445

85 + 92 + 81 + 95 = 353

445 - 353 = 92

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Data:
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3 years ago

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Write the inverse function for the function, ƒ(x) = 1/2x + 4. Then, find the value of ƒ -1(4). Type your answers in the box

anastassius [24]

F(x) = (1/2)x + 4
Plug y in for f(x).
y = (1/2)x + 4
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x = (1/2)y + 4
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Subtract 4 from both sides.
x - 4 = (1/2)y
Multiply each term 2.
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Plug f^-1(x) in for y.
f^-1(x) = 2x - 8

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f^-1(4) = 0

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3 years ago