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Yuki888 [10]
3 years ago
10

What is the simplified expression

Mathematics
1 answer:
sergey [27]3 years ago
8 0
H. -74x^2 + 46x. using the foil technique you would get (81x - 54x^2) - (35x - 20x^2). subtract / add the like terms and you would get H as your answer
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A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind. Find the speed of the wind
Lunna [17]

Given:

A pilot can travel 450 miles with the wind in the same amount of time as 360 miles against the wind.

Pilot's speed in still air is 315 miles per hour.

To find:

The speed of the wind.

Solution:

Let the speed of wind be x miles per hour.

Speed with wind = 315+x miles per hour

Speed against wind = 315-x miles per hour

We know that,

Time=\dfrac{Distance}{Speed}

According to the question,

\dfrac{450}{315+x}=\dfrac{360}{315-x}

Divide both sides by 90.

\dfrac{5}{315+x}=\dfrac{4}{315-x}

By cross multiplication, we get

5(315-x)=4(315+x)

5(315)-5x=4(315)+4x

5(315)-4(315)=4x+5x

(5-4)315=9x

Divide both sides by 9.

\dfrac{(1)315}{9}=x

35=x

Therefore, the speed of wind is 35 miles per hour.

4 0
3 years ago
Change each fraction or mixed number to a percent. a. 2/5 b. 7/20 c. 1 11/16 d. 14 1/4
QveST [7]

Answer:

a. 20% b. 35% c. 1.6875 d. 14.25

8 0
3 years ago
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Divide. Each one. Please show work!! Thank you!! Please help. I don’t know how
Bas_tet [7]
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8 0
3 years ago
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30 pts AWNSER ASAP In 2 hours, Nolan can bake 5 1/2 dozen cookies. What is his unit rate in dozen cookies per hour?
seraphim [82]

Answer:

2 3/4 dozen cookies per hour

Step-by-step explanation:

To find his unit rate per hour, divide 5 1/2 by 2:

5.5/2

= 2.75 or 2 3/4 dozen cookies

So, his unit rate in dozen cookies per hour is 2 3/4

6 0
3 years ago
What does 7m- m equal
Norma-Jean [14]
7m-m\rightarrow7m-1m=m(7-1)\rightarrow6m

7m-m is equal to 6m.

4 0
1 year ago
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