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sergey [27]
3 years ago
7

Factor the expression x2 - 49. A. 7(x² – 7) B. 7.(2-7) C. 2+7(2-7) D. (x + 7)(x-7)

Mathematics
1 answer:
NISA [10]3 years ago
6 0
X^2 - 49 = (x + 7)(x - 7) = x^2 - 7x + 7x = 49 = x^2 - 49
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Robert believes that the lengths 8 in, 13 in, and 20 in will form a triangle. Is he correct?
adell [148]

Answer: I think it’s D

Step-by-step explanation:

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7 0
2 years ago
Find xy if x + y=3, x^2 + y^2 = 5
Vesna [10]

Answer:

mark me

Step-by-step explanation:

x+y=3

x=3-y

putting the value of x

in this

x²+y²=5

(3-y) ²+y²=5

9-6y+y²+y²=5

2y²-6y+9-5=0

2y²-6y+4=0

2y²-4y-2y+4=0

2y(y-2)-2(y-2)=0

(2y-2) (y-2) =0

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y=1 or y=2

so x=2 or 1

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8 0
2 years ago
HELP I’ll give you brainliest <br> This is timed I have 5 minutes
DiKsa [7]
Pretty sure it’s y=(x-5)^2+7
4 0
3 years ago
Mr. White can walk 3 miles in 45 minutes. How far can he walk in 1 hour
ioda

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Step-by-step explanation:

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7 0
2 years ago
Read 2 more answers
Susan solved this problem. She says the answer is hours. Susan spent hours babysitting on Monday and hours babysitting on Tuesda
grandymaker [24]
Susan answer = 7 1/4

Approximate spent hours on monday = 3
Approx. spend hours on Tuesday = 4 

So, In total, it is approx. 7

In short, Your Answer would be Option <span>A. Susan’s answer is reasonable. She spent almost 3 hours babysitting on Monday and a little more than 4 babysitting hours on Tuesday (3 + 4 = 7). That is a little more than 7 hours in all. 

Hope this helps!</span>
6 0
3 years ago
Read 2 more answers
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