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BigorU [14]
3 years ago
9

Geometry Question Find the area of the circle

Mathematics
2 answers:
gtnhenbr [62]3 years ago
8 0

Answer:

the area of the circle

= 706.5 cm²

Step-by-step explanation:

r = 1/2d

r = 1/2 × 30

r = 15 cm

\boxed{ \bold{formula = \pi \:  {r}^{2} }}

= 3.14 × 15 × 15

= 706.5 cm²

oee [108]3 years ago
5 0

Answer:

Area of the circle = 706.5 cm²

Step-by-step explanation:

Diameter = 30cm

Radius = 15cm

Area of the circle=πr²= 3.14(15)²= 3.14×225 = 706.5 cm²

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Can anyone explain how to do any of this?
pashok25 [27]

Answer:

qn 10. 15mn² - 23m²n +4m³

Step-by-step explanation:

1. distribute 4m through the parenthesis

8mn² - 12m²n + 4m³ - 2n(5m² - 3nm) + nm(n-m)

2. use the commutative property to reorder the terms

8mn² - 12m²n + 4m³ - 2n(5m² - 3mn) + mn(n - m)

3. distribute -2n through the remaining parenthesis

8mn² - 12m²n + 4m³ -10m²n + 6mn² + mn² - m²n

4. collect like terms

8mn² + 6mn² + mn² - 12m²n - 10m²n - m²n + 4m³

5. complete bodmas

15mn² - 23m²n +4m³

that's is how you do it so the answer is

15mn² -23m²n + 4m³

5 0
3 years ago
Hello i need help with these questions asap!!
makvit [3.9K]

We use direct proportionality:

360⁰......Pi×R² (full circle)

120⁰.......x

x=120×pi×R²/360=pi×R²/3

x=pi×4²/3=16.76mi²

A=3×pi cm², for an angle of 2×pi/3=120⁰

In a similar way we compute the area of the full circle:

360.........x

120..........3×pi

x=3×pi×360/120=9×pi=3²×pi.

Thus the radius is 3cm.

3 0
2 years ago
Determine the type of triangle that has side lengths of 45, 45, and 90.
olganol [36]

Answer:

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7 0
3 years ago
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Simplify -8(4-3x)-17x
Luda [366]
1. distribute the -8 into the parentheses and you get -32+24x-17x
2. combine like terms and get -32+7x
3. if you need to make it simpler set the equation = to zero -32+7x=0 and then add the 32 on both sides
4. 7x=32 and then divide by 7 and you get 32/7 or approximately 4.571

I hope this helped!! :)
4 0
3 years ago
Read 2 more answers
PLEASE HELP !! Math! Grade 8
Zina [86]

Answer:

Mapping A

Step-by-step explanation:

To clarify this, the first box in each mapping has to go to only one number to resemble a function.  Function A works because each number is going to another number once while Function B doesn't work because of the number 2 going into two numbers.

4 0
2 years ago
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