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3 years ago

A persons weekly wage is worked out by using the formula

1 answer:

8 0

The formula is : #of overtime hours(h) *£16 + basic pay (b)
So, the easier way to put it is W=h*16+b

A: Wage= £284

A. W=h(9)*16+b(140)
=9*16+140
=144+140
=284

B: Overtime = 11
So, with this one, we work backwards
Using the same formula

W=h*16+b
We can fill in
300=16h+124

First, subtract 124 on both sides leaving

176=16h
Now we divide 16 on both sides, canceling out the right side
Leaving
11=h

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Answer:

x = 112

Step-by-step explanation:

We can create two equations 1. one that calculates calories burned and 2.another that calculates minutes:

20*x + 5*y = 1200

x + y = 120

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x = 120 - y

then we can plug that into the top equation:

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divide by 5:

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distribute:

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and then do all that combining like factors what not and simplify and solve:

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3 years ago

The Census Bureau reports that 82% of Americans over the age of 25 are high school graduates. A survey of randomly selected resi

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Answer:

a) Mean = 1030; Standard deviation = 12.38.

b) The county result is unusually high.

Step-by-step explanation:

Problems of normally distributed samples can be 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

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

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. Subtracting 1 by the pvalue, we This p-value is the probability that the value of the measure is greater than X.

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This first question is a binomial propability distribution.

We have a sample of 1210 Amricans, so $n = 1210$ .