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MrMuchimi
3 years ago
8

There are 120 planes on an airfield. If 75% of the planes take off, how many planes took off?

Mathematics
1 answer:
Soloha48 [4]3 years ago
7 0

Answer:

You have to do 120 divided by 0.75 use a calculator

Step-by-step explanation:

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I've included two questions. Hopefully you can help me with both. Thanks!
lubasha [3.4K]

Answer:

  1.  value is 0; x-3 is a factor . . . . . . . . . . . . . .third choice

  2.  evaluates at x = -1; remainder is -11 . . . . first choice

Step-by-step explanation:

Dividing f(x) by (x -a) gives ...

  f(x)/(x -a) = g(x) +r/(x -a) . . . . some quotient and a remainder r

If we multiply this expression by (x -a), we see ...

  f(x) = (x -a)g(x) +r

so

  f(a) = (a -a)g(a) +r . . . . . evaluate the above equation at x=a

  f(a) = 0 +r

  f(a) = r . . . . . . . . . a statement of the remainder theorem

If r=0, then x-a is a factor of f(x) = (x-a)g(x).

___

1. We have "a" = 3, and f(3) = 0. Therefore (x-3) is a factor.

__

2. We have "a" = -1, and f(-1) = -11. Therefore the remainder from division by (x+1) is -11.

6 0
3 years ago
How would you best describe the two students outside the circles?
ruslelena [56]

Answer:

A. They are boys who are not in sixth grade and don't wear glasses.

Explanation:

5 0
3 years ago
Please help I can't work out the gradient​
Annette [7]

Answer:

a is 2.5

b is 1

gradient is rise over run

8 0
3 years ago
If (3,2) is a point on the line whose equation is y = 3x + k, ,<br> determine the value of k.
Svetllana [295]

Answer: -7

Step-by-step explanation: x=3 and y=2

3 0
3 years ago
Pls help
KATRIN_1 [288]

Answer:

169.04 in² (nearest hundredth)

Step-by-step explanation:

Surface area of a cone = \pir² + \pirl

(where r = radius of the base and l = slant height)

Given slant height l = 10 and surface area = 188.5

Surface area  = \pir² + \pirl

188.5 = \pir² + 10\pir

\pir² + 10\pir - 188.5 = 0

r = \frac{-10\pi +\sqrt{(10\pi )^2-(4\times\pi \times-188.5)} }{2\pi } = 4.219621117...

Volume of a cone = (1/3)\pir²h

(where r = radius of the base and h = height)

We need to find an expression for h in terms of l using Pythagoras' Theorem a² + b² = c², where a = radius, b = height and c = slant height

r² + h² = l²

h² = l² - r²

h = √(l² - r²)

Therefore, substituting found expression for h:

volume of a cone = (1/3)\pir²√(l² - r²)

Given slant height l = 10 and r = 4.219621117...

volume = 169.0431969... = 169.04 in² (nearest hundredth)

5 0
2 years ago
Read 2 more answers
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