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8090 [49]
3 years ago
15

What are the solution(s) of x^2-4=0 x=-4 or x=4 x=-2 or x=2 x=2 x=4

Mathematics
1 answer:
FinnZ [79.3K]3 years ago
3 0
<span>x^2-4=0
x^2 = 4
x = + - 2

answer
</span><span>x=-2 or x=2</span>
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A 14​-foot ladder is placed against a vertical wall of a​ building, with the bottom of the ladder standing on level ground 9 fee
timama [110]

Answer:

10.7 feet

Step-by-step explanation:

The ladder, the ground and the wall form the shape of a right angled triangle as shown in the image below.

The hypotenuse of the triangle is 14 feet (length of ladder)

The base of the triangle is 9 feet long (the distance from the base of the ladder to the wall)

We need to find the height of the triangle. We can apply Pythagoras rule:

hyp^2 = a^2 + b^2

where hyp = hypotenuse

a = base of the triangle

b = height of the triangle

Therefore:

14^2 = 9^2 + b^2\\\\196 = 81 + b^2\\\\b^2 = 196 - 81 = 115\\\\b = \sqrt{115} \\\\b = 10.7 feet

The wall reaches 10.7 feet high.

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4 years ago
You sell instruments at a Caribbean music festival. You earn $326 by selling 12 sets of maracas, 6 sets of claves, and x
IrinaK [193]
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4 years ago
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Solve the equation square root 2x – 7 + x = 5 algebraically, and justify the solution set
yarga [219]

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Step-by-step explanation:

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\left(2x+x\right)-7=5

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3x-7+7=5+7

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Simplify the fraction:

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x=\frac{4\cdot 3}{1\cdot 3}

Factor out and cancel the greatest common factor and the answer will be:

x=4

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2 years ago
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10 inches of snow produce about an inch of water. However, this number can vary depending on the area, temperature, etc.

hope this helps
4 0
4 years ago
Helppp please im confused a bit
fredd [130]

So for this one, all you have to do is plot the points it's giving you :)

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