3 years ago

Solve.1) (-85) ÷ 20 =2] 100 ÷ 60 =

Mathematics

1 answer:

Serhud [2]3 years ago

4 0

$- 85 \div 20 = - 4 \frac{1}{4} = - 4.25$

$100 \div 60 = \frac{5}{3} = 1 \frac{2}{3}$

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Read 2 more answers

Find the average rate of change of f(x) = 4x² – 3 from 3 to 9.

Lina20 [59]

Answer:

Step-by-step explanation:

Given:

$f(x) = 4x^2 - 3$

Required:

Average range of change from 3 to 9

SOLUTION:

Step 1:

Find f(3) and f(9):

To find f(3), replace x with 3 in the given function

$f(3) = 4(3)^2 - 3$

$f(3) = 4(9) - 3$

$f(3) = 36 - 3$

$f(3) = 33$

To find f(9), replace x with 9 in the given function

$f(9) = 4(9)^2 - 3$

$f(9) = 4(81) - 3$

$f(9) = 324 - 3$

$f(9) = 321$

Average rate of change = $\frac{f(b) - f(a)}{b - a}$

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Plug in the values into the formula for average rate of change.

$= \frac{321 - 33}{9 - 3}$

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Average rate of change = 44

3 0

3 years ago

Solve.1) (-85) ÷ 20 =2] 100 ÷ 60 =​

Solve.1) (-85) ÷ 20 =2] 100 ÷ 60 =