What is the differnence between (-2)^2 and -2^2 in math
2 answers:
Answer:
- (-2)^2 = 4
- -2^2 = -4
Step-by-step explanation:
The first is (-2)(-2) = 4.
The second is -(2)(2) = -4.
The order of operations says exponents are evaluated first. An exponent signifies repeated multiplication of the base.
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If your calculator is working correctly, it will show you the difference.
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Beware spreadsheet programs. They don't always follow the order of operations when evaluating formulas. Parentheses are often required to keep them honest.
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Answer:
C
Step-by-step explanation:
If a line is parallel to a side of a triangle and it intersects the other 2 sides then it divides those sides proportionally.
BE is such a line , then
=
( substitute values )
=
( cross- multiply )
9 BC = 46 ( divide both sides by 9 )
BC ≈ 5.1 ( to the nearest tenth )
Then
AC = AB + BC = 9.2 + 5.1 = 14.3
I think, if not sorry but I hope it helps !:)
