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3 years ago

Solve this equation: 2s + s + 12 = 132. a. s = 9 B. s = –30 C. s = 120 D. s = 40

2 answers:

8 0

The equation given in the question is
2s + s + 12 = 132
3s + 12 = 132
3s = 132 - 12
3s = 120
s = 120/3
= 40
From the above deduction we can see that the value of the unknown variable comes out to be exactly 40. This is possible because there is a single unknown variable and a single equation to get the value of the variable from. So the correct option among all the options given in the question is option "D".

4vir4ik [10]3 years ago

8 0

If you would like to solve the equation 2 * s + s + 12 = 132, you can do this using the following steps:

2 * s + s + 12 = 132
3 * s = 132 - 12
3 * s = 120 /3
s = 120/3
s = 40

The correct result would be D. s = 40.

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4 years ago

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When Colton commutes to work the amount of time it takes him to arrive is normally distributed with a mean of 41 minutes and a s

larisa86 [58]

Answer:

The Probability that commute will be between 33 and 35 minutes to the nearest tenth = 0.0189 ≅1.89%

Step-by-step explanation:

Step(i):-

Given mean of the Population(μ) = 41 minutes

Given standard deviation of the Population (σ) = 3 minutes

let 'X' be the random variable of Normal distribution

Let X = 33

$Z = \frac{x -mean}{S.D} =\frac{33-41}{3} = -2.66$

let X = 35

$Z = \frac{x -mean}{S.D} =\frac{35-41}{3} = -2$

Step(ii):-

The Probability that commute will be between 33 and 35 minutes to the nearest tenth

P(33≤ X≤35) = P(-2.66 ≤X≤-2)

= P( X≤-2) - P(X≤-2.66)

= 0.5 - A(-2) - (0.5 - A(-2.66)

= 0.5 -0.4772 - (0.5 -0.4961) (From normal table)

= 0.5 -0.4772 - 0.5 +0.4961

= 0.4961 - 0.4772

= 0.0189

The Probability that commute will be between 33 and 35 minutes to the nearest tenth = 0.0189 ≅1.89%

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