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3 years ago

WILL MARK BRAINLIEST!!!!

Mathematics

2 answers:

Ber [7]3 years ago

8 0

Answer:

Step-by-step explanation:

2x-3

2(21)-3

42=3

svetlana [45]3 years ago

6 0

Answer:

its 5

3(2x-3)=21

6x-9=21

6x=30

x=5

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the ages of two friends Sunaina and Tanish are differ by 2 years sunaina's father is twice as old as Sunaina and Tanisha is twic

nikklg [1K]

Let S represent Sunaina's age.

Let T represent Tanish's age.

So 2S - T/2 = 40, 4S - T = 80.

Either S - T = 2 or T - S = 2. Let's try both cases.

Either 3S = 78 or 3S = 82.

Since 82 is not a multiple of 3, S = 26.

So Sunaina is 26 years old and Tanish is 24 years old.

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3 years ago

If Angie’s gross pay for 21.5 hours was $282.08, what was her pay per hour?

xxMikexx [17]

Answer:

$13.12 per hour

Step-by-step explanation:

Take the total pay and divide by the number of hours

$282.08/21.5 hours

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3 years ago

Read 2 more answers

Point-Slope Form Practice

Lana71 [14]

Answer:

$y=-x-7$

Step-by-step explanation:

Equation of straight line in point slope form is given as

$y-y_1=m(x-x_1)$

Here

$m=-1 \ and \ (x_1, y_1)=(-2, -5)$

Therefore,

$y+5=-1(x+2)$

$y=-x-7$

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3 years ago

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3 years ago

A bowling leagues mean score is 197 with a standard deviation of 12. The scores are normally distributed. What is the probabilit

Bond [772]

Answer:

0.281 = 28.1% probability a given player averaged less than 190.

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 z-score 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 p-value, we get the probability that the value of the measure is greater than X.

A bowling leagues mean score is 197 with a standard deviation of 12.

This means that $\mu = 197, \sigma = 12$

What is the probability a given player averaged less than 190?

This is the p-value of Z when X = 190.

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

$Z = \frac{190 - 197}{12}$

$Z = -0.58$

$Z = -0.58$ has a p-value of 0.281.

0.281 = 28.1% probability a given player averaged less than 190.

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3 years ago