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yan [13]
2 years ago
10

ms. cox and her three friends are dining at a restaurant. the food they order cost %80. the bill includes an additional 15% serv

ice charge. how much does each person pay if they share the bill equally
Mathematics
1 answer:
zlopas [31]2 years ago
5 0

did i hear help i will help you soooooooo oooooooooo

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Yes they do form a proportion since they both simplify to 6/11
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What is 2/6 subtracted by 7/12
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2/6=4/12
4/12+7/12=11/12
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Solve for x -6 >_ 10 - 4x
Otrada [13]

We are given this inequality,

-6\geq10-4x

We will follow these steps to solve it:

Step 1:

First let us bring 10 to the left side.

10 is in addition on right, so we apply opposite operation of addition that is subtracting 10 from left side, we get

-6-10\geq-4x

-16\geq-4x

Step 2:

Next we have to eliminate -4 which is in multiplication with x on the right side.

So applying opposite operation of multiplication that is dividing both sides by -4.

We have to consider here that when we divide or multiply with a negative the sign of inequality reverses, that is ≥ becomes ≤ and vice versa.

\frac{-16}{-4}\leq x

x≥4

Answer is last option x≥4.

6 0
3 years ago
Paul has grades of 63 and 81 on his first two tests. What must he score on his third test in order to have an average of at leas
IgorC [24]
To get an average of at least a 70, Paul would have to get at least a 66 on his third test.
3 0
3 years ago
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he temperature at any random location in a kiln used in the manufacture of bricks is normally distributed with a mean of 925 and
Leviafan [203]

Answer:

The proportion of bricks that crack during the firing process is 0.0001 = 0.01%.

Step-by-step explanation:

Normal Probability Distribution:

Problems of normal distributions 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}

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.

Mean of 925 and a standard deviation of 60 degrees.

This means that \mu = 925, \sigma = 60

The proportion of bricks that crack during the firing process is closest to

This is 1 subtracted by the pvalue of Z when X = 1150. So

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

Z = \frac{1150 - 925}{60}

Z = 3.75

Z = 3.75 has a pvalue of 0.9999

1 - 0.9999 = 0.0001

The proportion of bricks that crack during the firing process is 0.0001 = 0.01%.

5 0
3 years ago
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