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damaskus [11]
4 years ago
12

What is the diameter of a 30 inch circle?

Mathematics
1 answer:
Svetach [21]4 years ago
8 0
C = (pi) * d
C / (pi) = d

30 / 3.14 = d
9.55 = d
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10(x-2) = -20<br> Solve
ale4655 [162]

Answer:

x=0

Step-by-step explanation:

10(x-2)=-20

10x-20=-20

add 20 on both sides.

10x=0

10 times 0 =0

x=0


7 0
3 years ago
Read 2 more answers
The formula A=P(1+r)t is used to show the total amount owed for a loan with a simple annual interest rate.
vodka [1.7K]
We are asked to express r in terms of A, P, and t.

We first divide both sides of the equation by t, which gives us

                                         
                     \displaystyle{ \frac{A}{t}=P(1+r), 


then, dividing both sides by P, we have

                     \displaystyle{ \frac{A}{Pt}=1+r.

Swap the sides:

                    \displaystyle{ 1+r= \frac{A}{Pt} 
      
Finally subtracting 1 from both sides gives us

                     \displaystyle{ r=\frac{A}{Pt}-1.


5 0
3 years ago
Read 2 more answers
What is the equation of the axis of symmetry for the parabola y equals start fraction one over three end fraction left parenthes
wariber [46]
The correct axis of symmetry is x = -1.

Explanation:

Our equation is
y=\frac{1}{3}(x+1)^2-3.

This is in vertex form, which is 
y = a(x-h)² + k, where (h, k) is the vertex.

In our equation, h corresponds with -1 and k corresponds with -3, making the vertex (-1, -3).

The axis of symmetry is the x-coordinate of the vertex; this makes the axis of symmetry for this equation x = -1.
6 0
3 years ago
jillian is trying to save water so she reuces the size of her square grass lawn by 8 ft on each side the area of the smaller law
dusya [7]
(x - 8)^2 = 144
take the sq rt of both sides
x - 8 = 12
x = 12 + 8
x = 20

20 feet by 20 feet
5 0
3 years ago
Read 2 more answers
PlZ HELP WILL MARK YOU AS THE BRAINLIEST!
defon

Answer:

1. distance = sqrt( (7-7)^2+(2- -8)^2) = 10

2.  check out desk (0,0 ) => distance = sqrt( (0- -9)^2+(0-0)^2) = 9

3. last corner ( -3, 4)

4. area = sqrt( (-10- -10)^2+(10-4)^2) x sqrt( (-3- -10)^2+(10-10)^2) = 6x7 =42

5. check desk (0,0), south direction = negative y axis => P_beginning (0,-20), P_end (0,-(20+25)) = (0,-45)

6. A(-2,-1) and B(4,-1) lie in y =-1. AB = sqrt( (-2- 4)^2+(-1- -1)^2) =6

=> area = 3.6x6 =21.6

=> peri = 2x(3.6+6) = 19.2

7. A(-5,4) and B(2,4), AB =  sqrt( (-5- 2)^2+(4- -4)^2) = 7 => AB is base

=> p = peri = 7+ 8.3x2 = 23.6

=> area = sqrt[px(p-7)x(p-8.3)x(p-8.3)]

             =sqrt[23.6x(23.6-7)x(23.6-8.3)x(23.6-8.3)] = 302.8

5 0
4 years ago
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