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strojnjashka [21]
4 years ago
14

Simply (2x^-3 y^5) (-4x^8 y^2)

Mathematics
1 answer:
In-s [12.5K]4 years ago
5 0
The ans is B

(2x^-3 y^5) (-4x^8 y^2)
= (-2x^-3 y^5) (4x^8 y^2)
= -8x^5 y^7


Hope can help u
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(01.01 LC)A dancer took forward and backward steps of equal length during a dance. After taking 16 steps total, she was back at
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Since the steps are the same size, and she ended up where she started, she must have taken the same number of steps forward as she took backward.

16/2 = 8

She took 8 steps forward and 8 steps backward.

5 0
3 years ago
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To approach the runway, a pilot of a small plane must begin a 10 degrees descent starting from a height of 1983 feet above the g
ddd [48]
<h3>Answer:</h3>

2.2 miles

<h3>Explanation:</h3>

The mnemonic SOH CAH TOA reminds you that

... Sin = Opposite/Hypotenuse

We are given an angle (10°) and its opposite side length (1983 ft), and we are asked to find the hypotenuse (the straight-line distance from the plane to the runway).

... sin(10°) = (1983 ft)/distance

Multiplying by distance and dividing by sin(10°), we have ...

... distance = (1983 ft)/sin(10°) ≈ 11419.6 ft

We want to express this in miles, so we have ...

... 11419.6 ft = (m mi)×(5280 ft/mi)

... (11419.6 ft)/(5280 ft/mi) = m mi ≈ 2.163 mi

Rounding to tenths, the distance is ...

2.2 miles

_____

<em>Comment on the question</em>

The distance from the plane to the airport is different than the horizontal distance from the airport at which the descent must start. The latter distance is the "adjacent" leg of the triangle, so must be found using the tangent function. Rounded to tenths, it is 2.1 miles.

8 0
3 years ago
Jenny bought 4 DVD's for $25.20. What was the unit rate?
alukav5142 [94]

I think its 6.3........

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3 years ago
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Help needed <br> Will award brainliest
nirvana33 [79]
Q17:

one week = $560
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Q18: 

one year = $28500
52 weeks = 28500
1 week = 28500 ÷ 52 = $548

Q19:

5% of $300000 = 0.05 x 300000 = $15000
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3 0
4 years ago
Find the value of c that completes the square
PilotLPTM [1.2K]

Answer:

The value of c that completes the square  x^2+2x+c is 1

Step-by-step explanation:

We need to find the value of c that completes the square  x^2+2x+c

The formula used will be: a^2+2ab+b^2=(a+b)^2

In the question given the value c can be found by breaking the middle term. we are given 2x while the general formula is 2ab for middle term so,

2(x)(1) = 2x

so, c= 1

Solving:

x^2+2x+c\\=x^2+2(x)(1)+(1)^2-(1)^2\\=(x+1)^2-1

So, the value of c that completes the square  x^2+2x+c is 1

6 0
3 years ago
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