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Bas_tet [7]
3 years ago
6

Find the perimeter of this semi-circle with radius, r = 22cm. Give your answer rounded to 1 DP.

Mathematics
1 answer:
shepuryov [24]3 years ago
3 0

Answer:

69.1 cm

Step-by-step explanation:

Circumference of a circle

c = 2πr

Half of that would be a semi-circle

c = πr

c = π * 22

c = 69.115038379

Rounded

69.1 cm

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The area of a rectangle may be determined by using the formula A = lw, where "A" stands for area, "l" stands for the length of t
JulsSmile [24]

Answer:

The area is 15 cm^2.

Step-by-step explanation:

Step 1: Start with the given formula.

Step 2: Then replace l and w with the given measures.

Step 3: Then do the calculation.

Step 1: A = lw

Step 2: A = (3 cm) * (5 cm)

Step 3: A = 15 cm^2

Answer: The area is 15 cm^2.

6 0
3 years ago
The solution to the system -2x+5y=-15 and 5x+2y=-6 is what
cupoosta [38]

Step-by-step explanation:

−2x+5y=−15 and 5x+2y=−6

Rewrite equations:

−2x+5y=−15;5x+2y=−6

Step: Solve−2x+5y=−15for x:

−2x+5y=−15

−2x+5y+−5y=−15+−5y(Add -5y to both sides)

−2x=−5y−15

−2x−2=−5y−15−2(Divide both sides by -2)

x=52y+152

Step: Substitute52y+152forxin5x+2y=−6:

5x+2y=−6

5(52y+152)+2y=−6

292y+752=−6(Simplify both sides of the equation)

292y+752+−752=−6+−752(Add (-75)/2 to both sides)

292y=−872

292y292=−872292(Divide both sides by 29/2)

y=−3

Step: Substitute−3foryinx=52y+152:

x=52y+152

x=52(−3)+152

x=0(Simplify both sides of the equation)

Answer:

x=0 and y=−3

8 0
3 years ago
Which set is an example of like fractions 1/2 and 3/2, 10/10 and5/5 ,7/4 and 4/7, 2/1 and 2/3
NeTakaya
10/10 and 5/5 are like fractions
4 0
3 years ago
What is the scale factor from polygon ABCD to polygon PQRS??
deff fn [24]

Scale factor is defined as a number which multiplies or scales some quantity.

The shape of the figure remains same, the image  becomes larger or smaller.

If the scale factor is greater than one, then the image is enlarged.

If the scale factor is less than 1 but greater that 0, then the image becomes smaller.

In the above image,  AD = 2 units.

It's corresponding side PS =  3 units

Similarly AB = 1 unit and PQ = 1.5 units

Hence , 1 * 1.5 = 1.5

2*1.5 = 3

Hence, the scale factor of the given image is 1.5 ... Answer

7 0
3 years ago
Calculate sum5.3 +(-7.45) =
dsp73

Answer: -43/20

Step-by-step explanation: you just need a college calculator to solve ,you need to just plug the numbers and it will do it for you.

6 0
3 years ago
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