The linear function f(x) = 0.9x + 79 represents the average test score in your math class, where x is the number of the test taken. The linear function g(x) represents the average test score in your science class, where x is the number of the test taken.

x g(x)
1 78
2 79
3 80

Part A: Determine the test average for your math class after completing test 2. (2 points)

Part B: Determine the test average for your science class after completing test 2. (2 points)

Part C: Which class had a higher average after completing test 4? Show work to support your answer. (6 points)

WILL MARK U BRAINLEST

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sqdancefan sqdancefan · Answer 1 · 2021-10-19T20:26:37+02:00

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Answer:

A. 80.8

B. 79

C. math

Step-by-step explanation:

A. Fill in x=2 and evaluate the expression.

f(2) = 0.9·2 +79 = 1.8 +79 = 80.8

After 2 tests, your math average is 80.8.

__

B. Read the value from the table for x=2:

g(2) = 79

Your science test average is 79 after 2 tests.

__

C. For the math average, we fill in x=4 in the function and do the arithmetic:

f(4) = 0.9·4 +79 = 3.6 +79 = 82.6

For the science score, we recognize that the score goes up 1 point for each test. Then the score after test 4 will be 80+1 = 81.

The math class average of 82.6 is higher than the science class average of 81 after 4 tests.

_____

Additional comment

The averages in the two classes will be the same after 20 tests: 97.