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Georgia [21]
2 years ago
6

What is the area of a half circle with a radius of 40 cm?

Mathematics
2 answers:
Andre45 [30]2 years ago
7 0

Answer:

5027 square centimeters (cm2)

Step-by-step explanation:

miskamm [114]2 years ago
7 0

Answer:

800π or 2513.3

Step-by-step explanation:

A = πr²/2

A = 1600π/2 or 800π

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Can someone show me how to do this?
andriy [413]
3/4 ( (-50+2)/5)
= 3/4 ( -48/5)
= 3/4 * -48/5
= -36/5
6 0
3 years ago
What is the difference?
matrenka [14]

Answer:

The Difference in mathematical terms is the result of subtracting one number from another.

Step-by-step explanation:

I'm not sure if you were looking for the definition of difference or the difference between two things (in which an image would be needed). Hopefully this helped, apologies if not.

8 0
2 years ago
What is 6/3 as a mixed number?
Reptile [31]
The mixed number of 6/3 is 2








Explanation








Nothing it’s just what it is
3 0
3 years ago
If y varies directly with x when y=8,x=20 find the value of x when y=42
Alecsey [184]

The value of x is 105 when y=42

Step-by-step explanation:

A direct proportion means that the change in one quantity will also cause the change in other quantity

Given

y varies directly with x

x ∝ y

when the proportionality symbol is removed a proportionality constant is introduced

x=ky\\k=\frac{x}{y}\\Putting\ y=8\ and\ x=20\\k=\frac{20}{8}\\k = \frac{5}{2}\\So,\ the\ equation\ will\ be\\x=\frac{5}{2}y\\Putting\ y=42\\x=\frac{5}{2}*42\\x=5*21\\x= 105

The value of x is 105 when y=42

Keywords: Proportion, Direct variation

Learn more about proportion at:

  • brainly.com/question/3398261
  • brainly.com/question/3614284

#LearnwithBrainly

5 0
3 years ago
Can anyone help me please?
antoniya [11.8K]

Plug in (-1, 3) into both equations

Ax - 2y = 4

A(-1) - 2(3) = 4

-A - 6 = 4   Add 6 on both sides

-A = 10       Divide -1 on both sides

A = -10


5x + By = -1

5(-1) + B(3) = -1

-5 + 3B = -1      Add 5 on both sides

3B = 4       Divide 3 on both side

B = \frac{4}{3}

6 0
3 years ago
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