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3 years ago

I need help with the area and perimeter

Mathematics

1 answer:

Lady_Fox [76]3 years ago

8 0

Answer:

Area would be 122.

Perimeter would be 45.

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What is the shaded portion of the circle

blagie [28]

Answer:

$(5\pi-11.6)\ ft^{2}$

Step-by-step explanation:

we know that

The area of the shaded region is equal to the area of the sector minus the area of the triangle

step 1

Find the area of the circle

the area of the circle is equal to

$A=\pi r^{2}$

we have

$r=5\ ft$

substitute

$A=\pi (5)^{2}$

$A=25\pi\ ft^{2}$

step 2

Find the area of the sector

we know that

The area of the circle subtends a central angle of 360 degrees

by proportion find out the area of a sector by a central angle of 72 degrees

$\frac{25\pi}{360}=\frac{x}{72}\\ \\x=72*25\pi /360\\ \\x=5\pi\ ft^{2}$

step 3

Find the area of triangle

The area of the triangle is equal to

$A=\frac{1}{2}(2.9+2.9)(4)= 11.6\ ft^{2}$

step 4

Find the area of the shaded region

Subtract the area of the triangle from the area of the sector

$(5\pi-11.6)\ ft^{2}$

8 0

3 years ago

Write a rule for the nth term of the sequence. Then find a20. Assume the first termis a₁. 86, 79, 72, 65…

hodyreva [135]

Answer:

an = a(n-1) - 7

Step-by-step explanation:

the second term is smaller than the first term 7.

a20 = a19 - 7

a19 = a18 - 7

=> a20 = (a18 - 7) - 7

Then you can accumalate until a1

-> a20 = a1 - 19*7 = 86 - 19*7 = -47

5 0

2 years ago

Solve the equation. у+ 3 = -у +9 y=1 y= 3 y= 6 y= 9

Anna007 [38]

The first y equals -3 and the second y equals -9

8 0

3 years ago

Simplify 3x-2+x+3 * What is the answer?

alexandr402 [8]

Answer:

Step-by-step explanation:

And in distributive property it would be

3x-2x+3

6 0

3 years ago

Read 2 more answers

Round 14,883 to the underlined place value.

nalin [4]

Answer: the answer when rounded would be 15000.... BUT the 4 in 14883 would be the underlined number.

Step-by-step explanation:

I took a test with this question

8 0

3 years ago