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3 years ago

Find the area of the circle. Leave your answer in terms of π.

Mathematics

2 answers:

jeka943 years ago

6 0

Answer:

254.47

Step-by-step explanation:

the area of a circle can be found using the formula

pi(radius)^2

in your problem, the radius is 9. Plug it into the equation

pi(9)^2

9^2 is 81

81(pi)

pi is about 3.14

area is 254.47

If you need help, feel free to message me

vova2212 [387]3 years ago

5 0

Answer:

81 $\pi$

Step-by-step explanation:

A= $\pi$ r²

A= $\pi$ 9²

A=81 $\pi$

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Find the area of the triangle

Mumz [18]

Step-by-step explanation:

$\frac{(3 + 6) \times 4}{2} = \frac{9 \times 4}{2} = 18 {m}^{2}$

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3 years ago

X + y = 152,<br><br> 8.5x + 12y = 1,656<br><br> How many hats were sold?

Elodia [21]

Answer:

x = 48 and y = 104

Step-by-step explanation:

Given equations are:

$x+y = 152\\8.5x+12y=1656$

From equation 1:

$x = 152-y$

Putting the value of y in equation 2

$8.5(152-y)+12y = 1656\\1292-8.5y+12y = 1656\\3.5y+1292 = 1656\\3.5y = 1656-1292\\3.5y = 364\\\frac{3.5y}{3.5} = \frac{364}{3.5}\\y = 104$

Now we have to put the value of y in one of the equation to find the value of x

Putting y = 104 in the first equation

$x+y = 152\\x+ 104 = 152\\x = 152-104\\x = 48$

Hence,

The solution of the system of equations is x = 48 and y = 104

The value of variable which was assumed for number of hats, is the total number of hats.

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alukav5142 [94]

Answer:

Step-by-step explanation:

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