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TiliK225 [7]
3 years ago
10

How do you do factor x²-49?

Mathematics
1 answer:
Allisa [31]3 years ago
3 0

Answer:

(x-7)*(x+7)

Step-by-step explanation:

49 can be factored as 7*7 = 7^2

x^2 - 49

= x^2 - 7^2

You also learned that a^2 - b^2 = (a-b) * (a+b), so in this case:

x^2 - 7^2  = (x-7) * (x+7)

So x^2 - 49 factored to become (x-7)*(x+7)

Hope this help you :3

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In the diagram the radius of the outer circle is 2x cm and the radius of the inner circle is 6 cm. The area of the shaded region
stich3 [128]

let's find the area of the outer circle and the inside circle

the inside's circle area

A= π x 6²=36π

the outer's

A' = π x 4x²= 4πx²

A'-A=4πx²- 36π=160πcm² equivalent to x²- 9=40, so x²=49 implies x =sqrt(49)=7, x=7.

5 0
2 years ago
Gwyneth begins solving for x in the equation 2(x-4)=5(4-2x)+4x.after applying the distributive property and combining like terms
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The answer would be:
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4 0
3 years ago
What are the x-coordinates of the solutions to this system of equations?
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Three-fourths was subtracted from a number, and then 5 1/4 was added to the result. The sum was -7.
Alika [10]

Answer:

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Step-by-step explanation:

Hope this helps :))

6 0
3 years ago
How many solutions does the system have?
amid [387]

Answer:

A; infinitely many solutions

Step-by-step explanation:

first, let's simplify the first equation to make it simpler.

divide both sides by 5

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new system

y=3x-8

y=3x-8

as you can see, they are the same.

not mandatory but useful!⬇⬇⬇⬇

just to be more clear, let's substitute them. since they're both already in y=, we can make them both set to each other.

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