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maw [93]
3 years ago
8

THE TOPIC IS: AREA OF CIRCLES!! PLEASE HELP ME WITH THIS QUESTION!!! WHATS THE ANSWER?? I WILL GIVE YOU BRAINLIEST AND A THANKS!

!! AND PLS PUT AN EXPLANATION!! THANK YOU GUYS SO MUCHHHH!!

Mathematics
1 answer:
elena55 [62]3 years ago
3 0

Hello!

The formula for area of a circle is A= π*radius^2 (radius squared)

We are given the radius, so now we must input this into our formula.

I will use 3.14 for an approximate value of pi, I am not sure what the rules are for your mathematics class.

A= π*radius^2

  = 3.14*9²

  = 3.14*81

  = 254.34 yd²

∴ <em>About </em>254.3 yd²

I hope this helps, and best of luck!

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When 7 is subtracted from two third of the square of a number it becomes 17 find the number​
Dmitry [639]

Answer:  6 or -6

hello,

Step-by-step explanation:

Let say n the number

\dfrac{2}{3} *n^2-7=17\\\Longrightarrow\ \dfrac{2}{3} *n^2=24\\\Longrightarrow\ n^2=\dfrac{3*24}{2}\\\Longrightarrow\ n^2=36\\\Longrightarrow\ (n-6)(n+6)=0\\\\n=6\ or\ n=-6\\

8 0
3 years ago
A store is having a sale on chocolate chips and walnuts. For 3 pounds of chocolate chips and 5 pounds of walnuts, the total cost
mrs_skeptik [129]

Answer:

Step-by-step explanation:

3c + 5w = 16

6c + 2w = 22

-6c - 10w = -32

6c  + 2w = 22

-8w = -10

w = 10/8 = 5/4 = $1.25 per lb

3c + 5(1.25) = 16

3c + 6.25 = 16

3c = 9.75

c = $3.25 per lb

5 0
3 years ago
Michelle bought two blouses for $18.20 each. If she received a 10% discount for the blouses and the sales tax rate is 7.25%, how
Gnesinka [82]
The answer is B. $17.57
3 0
3 years ago
The sales tax in your city is 4.4%, and an item costs $3 before tax.
defon

Answer:

0.132

Step-by-step explanation:

4.4%*3=0.132

6 0
3 years ago
Given h(x) = 5x -1, find h(1).
Norma-Jean [14]
H(1) = 4


h(1)= 5 x 1 -1
=5-1
=4
hope that helps <3
5 0
3 years ago
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