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2 years ago

Hey can u please help i will give brainliy if u get it right :)

Mathematics

1 answer:

KATRIN_1 [288]2 years ago

5 0

9514 1404 393

Answer:

400 minutes

Step-by-step explanation:

The cost of the first plan is ...

A = 14 + 0.15m . . . . . . . . where m is the number of minutes used

The cost of the second plan is ...

B = 30 + 0.11m

The costs will be equal when ...

14 +0.15m = 30 +0.11m

0.04m = 16 . . . . . . . . . . . . . subtract 14+0.11m from both sides

m = 400 . . . . . . . . . . . . . . . divide by 0.04

The plans will have the same cost for 400 minutes of calls.

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2 years ago

Sydney is 5 feet and 1 inch tall. What would her height be in centimeters? (1 foot = 12 inches, 1 inch = 2.54 centimeters) 24.01

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2 years ago

Read 2 more answers

The function C(x)=−20x+1681 represents the cost to produce x items. What is the least number of items that can be produced so th

Reptile [31]

Answer:

<em>The least number of items to produce is 41</em>

Step-by-step explanation:

<u>Average Cost</u>

Given C(x) as the cost function to produce x items. The average cost is:

$\displaystyle \bar C(X)=\frac{C(x)}{x}$

The cost function is:

$C(x) = -20x+1681$

And the average cost function is:

$\displaystyle \bar C(X)=\frac{-20x+1681}{x}$

We are required to find the least number of items that can be produced so the average cost is less or equal to $21.

We set the inequality:

$\displaystyle \frac{-20x+1681}{x}\le 21$

Multiplying by x:

$-20x+1681 \le 21x$

Note we multiplied by x and did not flip the inequality sign because its value cannot be negative.

Adding 20x:

$1681 \le 21x+20x$

$1681 \le 41x$

Swapping sides and changing the sign:

$41x \ge 1681$

Dividing by 41:

$x\ge 41$

The least number of items to produce is 41

8 0

2 years ago

True of False: (log x)^2=2log x. Explain your answer and show your work

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False.
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yet 2log(10)=2*1=2

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3 years ago