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Flura [38]
3 years ago
11

Find the area of a circle with radius equal to 7.

Mathematics
1 answer:
Finger [1]3 years ago
7 0

Answer:

153.86 square units OR 49π OR 154 square units

Hope that helps!

Step-by-step explanation:

A = 49 x pi

A = 153.86

Hope that helps!

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Rewrite the equation of the parabola in vertex form. y= x2 + 8x - 21
sergey [27]

Answer:

y=(x+4)^{2}-37

Step-by-step explanation:

we know that

The equation of a vertical parabola into vertex form is equal to

y=a(x-h)^{2}+k

where

(h,k) is the vertex of the parabola

if a> 0 then the parabola open upward (vertex is a minimum)

if a< 0 then the parabola open downward (vertex is a maximum)

In this problem we have

y=x^{2}+8x-21

Convert to vertex form

Complete the square

y+21=x^{2}+8x

y+21+16=(x^{2}+8x+16)

y+37=(x^{2}+8x+16)

y+37=(x+4)^{2}

y=(x+4)^{2}-37 --------> equation in vertex form

The vertex is the point (-4,-37)

the parabola open upward (vertex is a minimum)

4 0
3 years ago
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What is x − 2 y − 2 = 0 in slope intercepct form?
dmitriy555 [2]

Answer:

y=1/2x-1

Step-by-step explanation:

hope this helps

6 0
3 years ago
If a=0 b=0 then complex number a+bi is what type NEED HELP THANKS
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The answer is a. If there is an i in the equation, then that means “i” is imaginary.
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Justin has $7.50 more than Ava and Emma has $12 less than Justin. Together, they have a total of $63.00. How much money does eac
Semmy [17]
Justine > Ava > Emma
12 - 7.5 = 4.5
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3 years ago
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