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ale4655 [162]
3 years ago
14

If a = 2 and b = -3, find the value of a3 - b2. A.-31 B.-23 C.-1 D.15

Mathematics
2 answers:
adelina 88 [10]3 years ago
4 0

Plug in -3 for b, and 2 for a

2^3 - (-3)^2

Remember to always follow PEMDAS. First, do the exponents

2^3 = 2 x 2 x 2 = 8

(-3)^2 = -3 x -3 = 9

Subtract

8 - 9 = -1

-1 is your answer

hope this helps

valentinak56 [21]3 years ago
3 0

Hello!

So let's first start out by solving the left side of the equation:

2 to the third power is 8

The right side now: -3 to the second power is -9

In total: 8- (-9)

So your answer is C) -1

I hope it helps!

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Multiply or divide the following measurements. Be sure each answer you enter contains the correct number of significant digits.
nydimaria [60]

Answer:

93.4 g/mL x 20. mL = 1868g.

489.7m / 53.061 s = 9.23 m/s

216.3 m/66.4 s = 3.26 m/s.

Step-by-step explanation:

Let's analyze each case.

93.4 g/mL x 20. mL

Hewe we are multiplying g/ml*ml. So we have the answer is (g*ml/ml) = g.

So

93.4 g/mL x 20. mL = 1868g.

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We are dividing a measurement in m by a measurement in s. So the answer is in m/s.

So

489.7m / 53.061 s = 9.23 m/s

216.3 m/66.4 s

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We are dividing a measurement in m by a measurement in s. So the answer is in m/s.

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216.3 m/66.4 s = 3.26 m/s.

6 0
3 years ago
A company rents out 10 food booths and 25 game booths at the county fair. The fee for a food booth is $100 plus $2 per day. The
svetlana [45]

Answer:

2,250 + 95n

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Cost of a food booth = 100 + 2n

Cost of 10 food booth = 10(100 + 2n)

= 1,000 + 20n

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Cost of 25 game booth = 25(50 + 3n)

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Total amount earned by the company = Cost of 10 food booth + Cost of 25 game booth

= (1,000 + 20n) + (1,250 + 75n)

= 1,000 + 20n + 1,250 + 75n

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= 2,250 + 95n

Total amount earned by the company = 2,250 + 95n

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3 years ago
A ball is released from a height of 180 meters. In the first second, the ball drops 5 meters, in the second 15 meters, in the 3r
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Answer:

a. 4

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3 years ago
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gregori [183]

\frac{1}{4} (2 + v) = 3 \\  \frac{1}{2}  +  \frac{1}{4} v = 3 \\ 2 + v = 12 \\ v = 10

Answer is A.

Hope this helps. - M
8 0
3 years ago
Read 2 more answers
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katen-ka-za [31]
12 because db/ad = 3 and ab = 8
thus de+(de/3) is the answer 
12 <- answer
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