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Neporo4naja [7]
3 years ago
5

I need help solving x^2-2=7 by factoring

Mathematics
1 answer:
bonufazy [111]3 years ago
4 0

x^2-2=7

Subtract 7 from both sides

x^2-2-7=7-7

x^2-9=0

x^2-3^2=0

Using a^2-b^2=(a+b)(a-b)

Where a=x and b=3

(x-3)(x+3)

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Fiesta28 [93]
Draw the triangle and then use Pythagoras' theorem

distance = \sqrt{18 ^{2} +8 ^{2}   }
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4 0
2 years ago
A 50 centimeter piece of wire is bent into a circle. What is the area of this circle?
Korvikt [17]

Answer:

198.95 cm²

Step-by-step explanation:

Circumference = 50cm

C = πD

D = C/π

r = D/2

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6 0
2 years ago
Need Help ASAP!!
gulaghasi [49]
The correct answer is B.1
7 0
3 years ago
Read 2 more answers
Janeile has 6 hours to spend training for an upcoming race. She completes her training by running full speed the distance of the
Flauer [41]

Answer:

running 1.5 hours

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Step-by-step explanation:

Let the amount of time she spends on walking be x

d/3 + d/9 = 6            Multiply by 9

3d + d = 6*9

4d = 54                     Divide by 4

4d/4 = 54/4            

d = 13 2/4 = 13 1/2 = 13.5 miles

d/3 = 13.5/3 = 4.5 hours

d/9 = 13.5/<u>9 = 1.5 hours</u>

Total                6 hours

I hope this is the right interpretation.

7 0
2 years ago
There are 6 brown, 5 blue, and 2 orange marbles in a hat. What is the probability of picking two orange marbles in a row without
xenn [34]
<span>The correct answer is 1/78.

Explanation<span>:
There are 2 orange marbles out of 13 total marbles, so the probability of your first marble being orange is 2/13.

After this one is drawn, since it is not returned, the probability of getting a second orange marble is 1/12, since there is only 1 orange marble left out of 12 total marbles.

This gives us the total probability 2/13(1/12)=2/156=1/78.</span></span>
8 0
3 years ago
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