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pashok25 [27]
3 years ago
6

Evaluate -a - 12a^2 for a = -1 a. -13 b. 13 c.-11

Mathematics
2 answers:
Gelneren [198K]3 years ago
8 0

C

substitute a = - 1 into the expression

- (- 1) - 12(- 1)² = 1 - (12 × 1 ) = 1 - 12 = - 11 → C


aleksandr82 [10.1K]3 years ago
7 0

c because PEMDAS start with the exponents so (-1)^2 =1 times -12=-12 and --1=1 so we end up with 1-12 or -11 which is C

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Mark bought a notebook for $1.45 and some pencils for $0.42 each. If the total cost was $6.91, how many pencils did he buy?
Lesechka [4]
B - 13

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x= number of pencils he brought.
we know the price of 1 notebook + the cost of pencils times the numbers of pencils he brought = total cost.

So the equation will be:

1.45 + 0.42x = 6.91  subtract 1.45 on both sides.
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5 0
2 years ago
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Luden [163]
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3 years ago
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777dan777 [17]

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