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Lina20 [59]
3 years ago
9

Solve the equation. Then check your solution.

Mathematics
1 answer:
ra1l [238]3 years ago
7 0

Answer:

4

Step-by-step explanation:

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Trina has two brothers. one brother is 7 years older than trina and the other brother is 7 years younger than trina. the product
AlladinOne [14]
(a) 95 = (x+7)*(x-7)

(b) 95 = (x+7)*(x-7) 
Expand the brackets:
95 = x² -7x + 7x -49 = x² - 49
Subtract x² from both sides:
95-x² = -49
Subtract 95 from both sides:
-x²=-49-95 
-x²= -144
Divide both sides by -1 to get rid of the negative numbers:
-x²/-1=-144/-1
x²=144
Take the square root of 144:
x = ± squareroot of 144
x = 12 or -12
x = 12 because you cannot have a negative age so Trina is 12 years old.
     
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3 years ago
What is 50% of 20% = ?
algol [13]
10% because .5x.2=.1
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kondaur [170]

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Step-by-step explanation:

3.14(a²+ab)=

<em>Plugging in values for a and b</em>

3.14(4²+4×3)=

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How do I solve for x?<br><br> -7x-3x+2= -8x-8
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-7X -3X+8X=-8-2

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