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4 years ago

A plane is flying at 31,348 feet. It needs to rise to 36,000 feet in two stages

Mathematics

1 answer:

sp2606 [1]4 years ago

7 0

Answer: about 22 minutes
Explanation: its hard to explain but trust me i checked my work

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Camila and Evelyn work at a dry cleaners ironing shirts.Camila can iron 40 shirts per hour, and Evelyn can iron 20 shirts per ho

GalinKa [24]

60 shirts can be ironed per hour with two workers

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3 years ago

Read 2 more answers

Whats the answer to 2y^0-(3y)^0

mrs_skeptik [129]

Answer:

Step-by-step explanation:

To answer this question, we need to that any number (except zero) raised to power 0 is equal to 1. With that in mind, let's solve this:

2y^0 - (3y)^0

= 2(1) - (1)

= 1

Note: 2y^0 = 2(y^0) = 2(1) = 2 whereas

(2y)^0 = 1

6 0

3 years ago

While traveling to and from a certain destination, you realized increasing your speed by 40 mph saved 4 hours on your return. Th

Sholpan [36]

Answer:

An equation that relates the speeds of the two legs of the trip

$\frac{640}{x-40}+\frac{640}{x}=4$

Explanation:

Given, we have to use x to represent the speed on the second leg

Speed on first leg when increasing your speed by 40 mph will be (x-40)

Distance is given as 640 miles and time is calculated as

$\text { Time }=\frac{\text { Distance travelled }}{\text { speed }}$

According to the question, increasing speed saved four hours

Therefore, the equation that relates the speeds of the two legs of the trip will be

$\frac{640}{x-40}+\frac{640}{x}=4$

5 0

4 years ago

Please help! I need to finish this before the cutoff!!!!!

katrin2010 [14]

Answer:

im not 100% sure but i think its the last one

im not 100% sure though

Step-by-step explanation:

7 0

3 years ago

If the standard deviation is 7.3kg, what is the variance?

sasho [114]

Answer:

The variance is 53.29 kg²

Step-by-step explanation:

The standard deviation is the square root of the variance.

$S(X) = \sqrt{V(X)}$

In which problem, we have that:

$S(X) = 7.3$

$\sqrt{V(X)} = 7.3$

$\sqrt{V(X)}^{2} = (7.3)^{2}$

$V(X) = 53.29$

The variance is 53.29 kg²

6 0

3 years ago