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3 years ago

90 points PLZ HURRY Express 7 as a fraction. A) 1 7 B) 14 2 C) 2 7 D) 20 3

Mathematics

1 answer:

Vika [28.1K]3 years ago

8 0

Answer:

B) 14/2

Step-by-step explanation: 1/7 is a smaller number over a larger number, and we want a larger number over the bottom number for a whole number. 2/7 is the same reason. 20/3 as a whole number is 6 and 2/3 so no. 14/2 is the only answer

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Sam left a 18% tip on a 55$ dinner bill. A- how much was the tip? B- what was the total bill?

Sliva [168]

A= $9.90 B= $64.90

because, 18% of $55 is $9.90. Then you would add $9.90 to $55 and get $64.90

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2 years ago

The time that it takes a randomly selected job applicant to perform a certain task has a distribution that can be approximated b

zepelin [54]

Answer:

If the task is performed in less than or equal to 130.8 seconds, then, the individuals qualify for advanced training.

Step-by-step explanation:

We are given the following information in the question:

Mean, μ = 150 sec

Standard Deviation, σ = 15 sec

We are given that the distribution of time taken is a bell shaped distribution that is a normal distribution.

Formula:

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

We have to find the value of x such that the probability is 0.10

P(X < x)

$P( X < x) = P( z < \displaystyle\frac{x - 150}{15})=0.10$

Calculation the value from standard normal z table, we have,

$\displaystyle\frac{x - 150}{15} = -1.282\\x = 130.8$

Thus, if the task is performed in less than or equal to 130.8 seconds, then, the individuals qualify for advanced training.

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3 years ago

A high school athletic department bought 40 soccer uniforms at a cost of $3,000. After soccer season they returned some uniforms

quester [9]

Interesting problem.

First - let's figure cost of each uniform at purchase.

3,000/40 = $75 each

When some uniforms were returned at $40 - there was a difference of $35 in what they paid and what they rec'd in return. ($75 - 35 = $40)

8 0

3 years ago

In the function, 9 (2-) = 9 - 5x, what is the value of g (3)?

vekshin1

Answer: 53

Step-by-step explanation:

3 0

3 years ago

The owner of a moving company typically has his most experienced manager predict the total number of labor hours that will be re

ValentinkaMS [17]

Answer:

0.9538

Step-by-step explanation:

The computation of the proportion of variation in labor hours is explained by the number of cubic feet moved is shown below:

Here the R^2 coefficient of determination, would be determined and applied the same

R^2 = 1 - SSE ÷ SST

= 1 - 123.97 ÷ 2685.9

= 0.9538

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3 years ago