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2 years ago

Please help What is the value of this expression when a = 7 and b = -4? |2a| - b/ 3

Mathematics

1 answer:

belka [17]2 years ago

3 0

Answer:

46/3

Step-by-step explanation:

|2a| - b/3

Plug in the values and evaluate.

|2(7)| - (-4)/3

|14| + 4/3

Apply | a | = a

14 + 4/3

42/3 + 4/3

= 46/3

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2 years ago

What percent of 41 is 27.9

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2 years ago

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What is 4/3 divided by 1/4?

konstantin123 [22]

Answer:

-----------

Step-by-step explanation:

4 1

-------- ÷ --------

3 4

-----------------------------------

To divide we are going to flip (1/4) and multiply the top and bottom together.

4 4 16

--------- × --------- = ------------

3 1 3

----------------------------------

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I hope this helps!

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10 months ago

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32) In one region, the September energy consumption levels for single-family homes are found to be normally distributed with a m

topjm [15]

Answer:

0.1946 is the probability that the September energy consumption level is between 1100 kWh and 1250 kWh.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 990 kWh

Standard Deviation, σ = 198 kWh

We are given that the distribution of energy consumption levels is a bell shaped distribution that is a normal distribution.

Formula:

$z_{score} = \displaystyle\frac{x-\mu}{\sigma}$

P(September energy consumption level is between 1100 kWh and 1250 kWh)

$P(1100 \leq x \leq 1250)\\\\ = P(\displaystyle\frac{1100 - 990}{198} \leq z \leq \displaystyle\frac{1250 -990}{198}) \\\\= P(0.5556 \leq z \leq 1.3131)\\\\= P(z \leq 1.3131) - P(z < 0.5556)\\\\= 0.9054- 0.7108= 0.1946$

0.1946 is the probability that the September energy consumption level is between 1100 kWh and 1250 kWh.

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2 years ago