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I am Lyosha [343]
3 years ago
12

Please help me with this question. I am very confused.

Mathematics
1 answer:
Oksanka [162]3 years ago
7 0
I think u do the ones in the parenthesis first bc of PEMDAS since it's both negative it become positive and u can cross out both the 2's and that leaves u with 1/7 and then u just times 1/7 with 8 and then u get 8/7

hoped this helped! :)
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Harold works at a men's clothing store which marks up its retail clothing by 27%
coldgirl [10]
Wheres the question?
8 0
3 years ago
a recipe for making 4 cups of soup requires 3 cups of water at this rate how many cups of water are required to make 24 cups of
Tema [17]

Answer:

18

Step-by-step explanation:

4 divided by 24 is 6

6x3=18

8 0
3 years ago
Express the recurring decimal 0.034 as a fraction in its simplest form.
LiRa [457]

Answer:

\frac{17}{495} will be the fraction.

Step-by-step explanation:

Here the recurring decimal number is 0.0343434....

To convert this recurring decimal to fraction we assume,

x = 0.03434....   -------(1)

Now multiply both the sides with 100.

100x = 3.43434.... ------(2)

Now subtract equation (1) from equation (2).

100x = 3.43434

<u>      x = 0.03434</u>

99x = 3.4

x = \frac{3.4}{99}

  = \frac{34}{990}

x = \frac{17}{495}

Therefore, fraction that represents the decimal number is \frac{17}{495}

4 0
3 years ago
"A study of the amount of time it takes a mechanic to rebuild the transmission for a 2005 Chevrolet Cavalier shows that the mean
Arada [10]

Answer:

85.31% probability that their mean rebuild time exceeds 8.1 hours.

Step-by-step explanation:

To solve this question, we need to understand the normal probability distribution and the central limit theorem.

Normal probability distribution:

Problems of normally distributed samples are solved using the z-score formula.

In a set with mean \mu and standard deviation \sigma, the zscore of a measure X is given by:

Z = \frac{X - \mu}{\sigma}

The Z-score measures how many standard deviations the measure is from the mean. After finding the Z-score, we look at the z-score table and find the p-value associated with this z-score. This p-value is the probability that the value of the measure is smaller than X, that is, the percentile of X. Subtracting 1 by the pvalue, we get the probability that the value of the measure is greater than X.

Central limit theorem:

The Central Limit Theorem estabilishes that, for a random variable X, with mean \mu and standard deviation \sigma, the sample means with size n of at least 30 can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}

In this problem, we have that:

\mu = 8.4, \sigma = 1.8, n = 40, s = \frac{1.8}{\sqrt{40}} = 0.2846

If 40 mechanics are randomly selected, find the probability that their mean rebuild time exceeds 8.1 hours.

This is 1 subtracted by the pvalue of Z when X = 8.1. So

Z = \frac{X - \mu}{\sigma}

By the Central Limit Theorem

Z = \frac{X - \mu}{s}

Z = \frac{8.1 - 8.4}{0.2846}

Z = -1.05

Z = -1.05 has a pvalue of 0.1469

1 - 0.1469 = 0.8531

85.31% probability that their mean rebuild time exceeds 8.1 hours.

4 0
3 years ago
Suppose you buy lunch for the drama club. You have enough money to buy 20 salads and 15 sandwiches. The group wants 12 sandwiche
bixtya [17]
You can buy 23 salads because the group wants 12 instead of 15 15-12=3
5 0
4 years ago
Read 2 more answers
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