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stiv31 [10]
3 years ago
6

Please answer!!!! Express (x + 9)2 as a trinomial in standard form.

Mathematics
1 answer:
Ghella [55]3 years ago
4 0

Answer:

x² +18x +81

Step-by-step explanation:

(a+b)²=a²+b²+2ab

(x+9)² = x²+9²+2*x*9= x² +18x +81

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A model car has a length of 7.25 inches. The actual car is 14.5 feet long. What is the scale of the model car?
finlep [7]

Answer:

1:24

Step-by-step explanation:

Convert inches to feet, 7.25 inches is 0.604 feet.

0.604:14.5 needs to become 1:something, so set up 0.604/14.5 = 1/x

Solve for x now by dividing 14.5 by 0.604. You get 24 for x, so the answer is 1:24 scale!

7 0
3 years ago
Flying against the wind, an airplane travels 6060 kilometers in 6 hours, Flying with the wind, the same plane travels 12,150 kil
geniusboy [140]

Let <em>s</em> be the plane's speed in still air and <em>w</em> the wind speed. Then

<em>s</em> - <em>w</em> = (6060 km)/(6 h) = 1010 km/h

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Adding these equations together eliminates <em>w</em> and lets you solve for <em>s</em> :

(<em>s</em> - <em>w</em>) + (<em>s</em> + <em>w</em>) = 1010 km/h + 1350 km/h

2<em>s</em> = 2360 km/h

<em>s</em> = 1180 km/h

7 0
3 years ago
Please help me with this as quickly as possible!
Brrunno [24]

Answer:

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is your answer

Step-by-step explanation:

7 0
3 years ago
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Feliz [49]

Answer: C, a woman whose father was a United States citizen

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Step-by-step explanation:

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