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3 years ago

13

How do u find perimeter of a semicircle

2 answers:

trasher [3.6K]3 years ago

6 0

I think what you do is pretend it is a circle and find the circumference of the circle then cut that amount in half. The straight side of the semicircle is the diameter of the whole circle, so you add that to the half of the circle. Hope this helps (and wasn't explained badly)!

Ber [7]3 years ago

3 0

(2(pi)r/2) + diameter

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Type your answer and then click or tap Done.<br> Simplify -(x-2y) - y.

AlladinOne [14]

Answer:

Step-by-step explanation:

x(x-2y)-(y-x)2

Final result :

-y2

Step by step solution :

Step 1 :

Equation at the end of step 1 :

x • (x - 2y) - (y - x)2

Step 2 :

2.1 Evaluate : (y-x)2 = y2-2xy+x2

Final result :

-y2

4 0

3 years ago

Read 2 more answers

an ivy plant was 19 inches long. two years later it was 33 inches long. what was the percent increase to the nearest hundredth o

lapo4ka [179]

Answer:

73.68%

Step-by-step explanation:

To find the amount of increase subtract 33-19 to get 14.

The percent increase is the amount of increase/initial length * 100

So 14/19*100 = 73.684...

Rounding to the nearest hundredth = 73.68%

4 0

4 years ago

30% of the employees at a company picnic ate a hot dog for lunch. If 18 employees ate a hotdog, how many people were at the picn

coldgirl [10]

See the photo attached above

5 0

3 years ago

Read 2 more answers

60% of what number is 72?

Hitman42 [59]

$60%=0.6$

$0.6*x=72$

$0.6x=72$

$x= \frac{72}{0.6}$

$x=120$

72 is 60% of 120

7 0

4 years ago

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Solve the proportions:

IRINA_888 [86]

<u>Answer:</u>

6. 6.75
7. 27
8. 92/17
9. 49

<u>Step-by-step explanation:</u>

<u>- Question 6 -</u>

9/16 = x/12
=> 16x = 12 x 9
=> 16x = 108
=> x = 6.75

Hence, <u>the value of x in this proportion is 6.75.</u>

<h3>_______________________________</h3>

<u>- Question 7 -</u>

-3 + x/18 = 12/9
=> -3/18 + x/18 = 4/3
=> x/18 = 4/3 + 1/6
=> x/18 = 8/6 + 1/6
=> x/18 = 9/6
=> x = 9/6 x 18
=> x = 27

Hence, <u>the value of x is 27</u>

<h3>_______________________________</h3>

<u>- Question 8 -</u>

17/15 = 10/2x - 2

=> 17(2x - 2) = 150

=> 34x - 34 = 150

=> 34x = 184

=> x = 184/34

=> x = 92/17

Hence, <u>the value of x is 92/17</u>

<h3>_______________________________</h3>

<u>- Question 9 -</u>

x - 16/x + 6 = 3/5
=> 5(x - 16) = 3(x + 6)
=> 5x - 80 = 3x + 18
=> 2x = 98
=> x = 49

Hence, <u>the value of x is 49.</u>

<h3>_______________________________</h3>

Hoped this helped.

3 0

3 years ago