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4 years ago

Someone help me quick!!

Mathematics

1 answer:

MrMuchimi4 years ago

6 0

I think it should be 31.5

6 builders over 21 days would be equal to 9 builders over X days. Then you would cross multiply

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A coffee shop spends $408 for an order of 17 cases of paper cups.

devlian [24]

528 will be your answer.

Step-by-step explanation:
408 / 17 = 24
1 case = $24.00

24 x 5 = 120

408 + 120 = 528

8 0

3 years ago

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What is the area of a rectangle with vertices (2, 3), (9, 3), (9, Negative 2), and (2, Negative 2)?

zepelin [54]

I would believe it is 35 units

8 0

3 years ago

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A) What percentage of 5³ is 5? b) What percentage of 5³ is 5²?

soldi70 [24.7K]

Step-by-step explanation:

a) 5³= 5*5*5 = 125

5/125*100%

b) 5²=5*5=25

25/125*100%

20%

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2 years ago

Given that y = (e^x)/x, x > 0, find the range of values of x where y is a decreasing

vodka [1.7K]

Answer:

The interval for which y is a decreasing function of x is:

$(0, 1)$

Or as an inequality:

$0$

Step-by-step explanation:

We are given the equation:

$\displaystyle y=\frac{e^x}{x}\, ,x>0$

And we want to find the range of values x for which y is a decreasing function of x.

y is decreasing whenever y' is negative. Find y' using the Quotient Rule:

$\displaystyle y'=\frac{(e^x)'(x)-e^x(x)'}{(x)^2}$

Differentiate:

$\displaystyle y'=\frac{xe^x-e^x}{x^2}$

y is decreasing whenever y' is negative. Thus:

$\displaystyle 0>\frac{xe^x-e^x}{x^2}$

Multiply both sides by x². This is always positive so we do not need to change the sign:

$xe^x-e^x$

Factor:

$e^x(x-1)$

eˣ is always positive. So:

$x-1$

Adding one to both sides produces:

$x$

Therefore, y is a decreasing function of x when x is less than one (and greater than 0).

In interval notation:

$(0, 1)$

Or as an inequality:

$0$

8 0

3 years ago

A sports announcer can say 80 words in 1/3 minute.whatis his speaking rate in words per minute?

Hitman42 [59]

Answer:240

Step-by-step explanation:

80 divided by 1/3

6 0

4 years ago

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