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timama [110]
3 years ago
14

Which is correct and why?

Mathematics
1 answer:
malfutka [58]3 years ago
3 0

Answer:

2

Step-by-step explanation:

The measure of angle x would be shown as 77+x=115 because we know these two angles have to equal 115, which is true as 77+38=115. The angle can't be larger than we already know it is, so Amelia is wrong anyway.

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R^2+8r=-7<br>solve the equation with the quadratic formula showing work
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Answer:

Step-by-step explanation:

r²+8r=−7

Step 1: Subtract -7 from both sides.

r²+8r−(−7)=−7−(−7)

r²+8r+7=0

Step 2: Use quadratic formula with a=1, b=8, c=7.

r=r=\frac{-b+or-\sqrt{-4ac}  }{2a}

r=\frac{-8+or-\sqrt{(8})^2-4(1)(7) }{2(1)}

7 0
3 years ago
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Step-by-step explanation:

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Step-by-step explanation:

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A number decreased by 23 is 44. Find the number.
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Answer:

A

Step-by-step explanation:

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x = 67

The number is 67

3 0
3 years ago
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