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Mandarinka [93]

3 years ago

11

Write the standard form of the equation of the circle of radius r=6 and center (h,k) = (0,0).

1 answer:

Mama L [17]3 years ago

5 0

Answer:

x²+y²=36

Step-by-step explanation:

any circle with center at (0,0)

has the equation of the form

x²+y²=r²

here r is radius r=6

so the answer

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HELP DUE IN 10 MINS!

Scilla [17]

Answer:

$\checkmark \text{B. The area of the circle is } 729\pi,\\\checkmark \text{D. The arc length of the sector is } 12\pi$

Step-by-step explanation:

Area of a circle with radius $r$ : $r^2\pi$

Circumference of a sector with radius $r$ : $2r\pi$

Area of sector with angle $\theta$ : $r^2\pi\cdot \frac{\theta}{360}$ .

Arc length of sector with angle $\theta$ : $2r\pi\cdot \frac{\theta}{360}$

Using these equations, we get the following information:

Area of circle: $27^2\pi=729\pi$

Circumference of a circle: $2\cdot 27\cdot \pi=54\pi$

Area of sector: $27^2\pi\cdot \frac{80}{360}=162\pi$

Arc length of sector: $2\cdot 27\cdot \pi \cdot \frac{80}{360}=12\pi$

3 0

2 years ago

What is the equivalent exsprssion of √54

FromTheMoon [43]

Answer:

3 $\sqrt{6}$

Step-by-step explanation:

using the rule of radicals

$\sqrt{a}$ × $\sqrt{b}$ ⇔ $\sqrt{ab}$

$\sqrt{54}$

= $\sqrt{9(6)}$ = $\sqrt{9}$ × $\sqrt{6}$ = 3 $\sqrt{6}$

3 0

2 years ago

you are biking at a speed of 18 miles per hour you are 3 miles behind your friends who is biking at a speed of 12 miles per hour

sladkih [1.3K]

You put them in fractions then cross multiple.
18/12 and 3/x so that's 36 equals 18x then you divide 36 by 18 which is 2.

5 0

2 years ago

Help me with this math problem I will give BRAINLIEST for the right answer.<br><br> Show your work**

aev [14]

Answer:

The answer is 9x-4.

Step-by-step explanation:

First calculate the area of the backyard. This is 13x-1. Then multiply the area of the patio so multiply x +3 by x+ 3. The answer to this is 4x+3. Next subtract the area of the patio from the area of the backyard. The answer is 9x-4.

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3 years ago

Emily waited in line for the StarCraft video game for 3 hours. If the line was only moving 2 1⁄4 feet per hour, how far did Emil

yaroslaw [1]

6 3/4 feet

2 1/4+2 1/4+ 2 1/4= 6 3/4

5 0

3 years ago

Read 2 more answers