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3 years ago

Help pls and no links

Mathematics

1 answer:

Svetlanka [38]3 years ago

7 0

We know a or b != 0

but a-b==0 so both are the same unknown number

b/a must = 1

a/b is equivalent to b/a as a/b=1 as well.

So the last answer choice.

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Candice won the lottery for 30000 dollars.However 20% of her money has to go to the state for taxes.How much money will she rece

Trava [24]

Answer:

She will receive $24,000 after paying taxes

Step-by-step explanation:

This question can be solved using a rule of three.

20% of her money has to go to the state for taxes. So she will receive 100-20 = 80%. $30000 is 100% = 1. How much is 80% = 0.8?

$30000 - 1

$x - 0.8

x = 30000*0.8

x = 24000

She will receive $24,000 after paying taxes

7 0

3 years ago

Tell whether the angles are adjacent or vertical. Then find the value of x.

maxonik [38]

Answer:

x = 63°

Step-by-step explanation:

~ They are adjacent angles because they have a common (one) vertex.

~ To find the value of x we must make an equation.

Angles on a straight line add up to 180°.

117 + x = 180

x = 180 - 117

x = 63°

8 0

3 years ago

I need help to see if their equivalent help fast pls

Taya2010 [7]

They are not equivalent. When you distribute the 1/4, the expressions are different.

8 0

3 years ago

kayla bought h number of hats for $13.25 each.if she has $50 dollars to spend ,how many hats could she have bought?

shutvik [7]

4 is the answer to your question

7 0

3 years ago

The mean of a certain set of measurements is 27 with a standard deviation of 14. The distribution of the

Talja [164]

Answer:

Exactly 16%.

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.

The mean of a certain set of measurements is 27 with a standard deviation of 14.

This means that $\mu = 27, \sigma = 14$

The proportion of measurements that is less than 13 is

This is the p-value of Z when X = 13, so:

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

$Z = \frac{13 - 27}{14}$

$Z = -1$

$Z = -1$ has a p-value of 0.16, and thus, the probability is: Exactly 16%.

8 0

2 years ago