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mrs_skeptik [129]
2 years ago
8

Evaluate (m4 + 5) – n (m+ + 5) – n3 if m = -2 and n = -4.

Mathematics
1 answer:
Y_Kistochka [10]2 years ago
7 0

Answer:

69

Step-by-step explanation:

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1. Janna works at a lab with a huge circular particle accelerator. It has a radius of 4 kilometers. What is the accelerator's di
blsea [12.9K]

Answer:

1. diameter=8 kilometres

2. area=98.96 inches

3. 37m

Step-by-step explanation:

1. diameter= 2*radius

2. area of sector=θ out of 360*πr^{2} where θ is the angle

3. area of garden=πr^{2}

        706.5=πr^{2}

     r^{2}=706.5/π

        = 225(nearest whole)

     r=\sqrt{225}=15m

we now use Pythagoras theorem to find length of each pathway

40^{2} =15^{2} +x^{2}

1600=225+x^{2}

x^{2}=1600-225=1375

x=\sqrt{1375}=37 m (to nearest whole)

5 0
3 years ago
Given the equation y = 3x − 4, what is the value of x when y = 5? A) 3 B) 6 C) 9 D) 12
Dmitrij [34]

Answer:

A. 3

Step-by-step explanation:

The answer would be A because 3 times 3 is 9 and 9-4=5 which is the value o f y. 3x-4=5

add 4 to both sides: 3x=5+4

simplify: 5+4=9

divide both sides by 3:  x= 9/3

simplify 9/3 to 3:

x= 3

hope this helps!!

7 0
3 years ago
Help please. solve for x and y.
ohaa [14]
To solve for x and y, you need to know if the triangles are congruent. They are because of their congruent sides and exterior angles are the same measure.
Now you know that the triangles are congruent, you can set up a proportion for the side lengths you are looking for.
For x...

22/10=x/12. Then cross mutiply. x =26.4
You can do this because the triangles are congruent.
For y...

22/10 =37.4/y. Then you cross multiply. y=17

The correct answer is B.
4 0
3 years ago
What is 516 expressed as a percent?
WINSTONCH [101]
 It is 51,600%. Hope it helps
3 0
3 years ago
Read 2 more answers
What is the value of the constant in the expression?<br> 2x2 + 3x - y - 18 + 7y2
Virty [35]
I think it’s 3x

Hope it helps
8 0
3 years ago
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