The circumference of a circle is 31.4 feet. What is the area?

1 answer:

4 0

A ≈ 78.46 ft

To find the answer just look up the formula for finding area with circumference and plug in the circumference

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Solve the system using substitution<br> 8x+9y=15<br> 5x-2y=17

Otrada [13]

$5x-2y=17\ \ \ \ |-5x\\-2y=-5x+17\ \ \ \ |:(-2)\\y=2.5x-8.5\\\\\text{substitute to the first equation}\\\\9x+9(2.5x-8.5)=17\ \ \ \ |\text{use distributive property}\\9x+22.5x-76.5=17\ \ \ \ |+76.5\\31.5x=93.5\ \ \ \ |:31,5\\x=3\\\\\text{substitute the value of x to the equation}\ y=2.5x-8.5\\\\y=2.5(3)-8.5=7.5-8.5=-1\\\\Answer:\ x=3,\ y=-1\to(3;\ -1)$

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3 years ago

What are the square roots of 64144 ? −812 and 812 −49 and 49 −3272 and 3272 −412 and 412

worty [1.4K]

Answer:

-8/12 and 8/12

Step-by-step explanation:

I took the test from K12, and that other guy did not help, so here you are! Good luck guys!!!

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3 years ago

A 236 inch board is cut into two pieces. one piece is three times the length of the other. find the length of the two pieces

kirill [66]

let length of one piece = x

length of other piece = 236-x

one piece is three times the length of the other

x=3(236-x)

x=708-3x

4x=708

x=177

so first piece is 177 inches long and second piece is (236-177)= 59 inches long

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3 years ago

The diameter and height of this cylinder are equal to the side length ,S, of the crude in which the cylinder is inscribed.What e

yulyashka [42]

Answer:

Step-by-step explanation:

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2 years ago

The jar only contains nickels and dimes altogether there are 10 coins total of the value is 90 cents how many nickels and how ma

lilavasa [31]

Write a system of equations and solve.

x + y = 10
5x + 10y = 90

Multiply and combine equations

-5x - 5y = -50
5x + 10y = 90
------------------
5y = 40
y = 8
x = 2

There are 2 nickels and 8 dimes in the jar. Hope this helps! :)

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3 years ago