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nordsb [41]
2 years ago
6

-2x - 35 = 9 - 4x answers

Mathematics
2 answers:
mote1985 [20]2 years ago
8 0

Answer:

22

Step-by-step explanation:

add 35 to the other side (to cancel out the negative) then you have 44, then add 4x to the other side so you have 2x then divide both sides by 2. x=22

dangina [55]2 years ago
3 0
The answer is x=22 !!!
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A high school student took two college entrance exams, scoring 1070 on the SAT and 25 on the ACT. Suppose that SAT scores have a
antoniya [11.8K]

Answer:

Due to the higher z-score, he did better on the SAT.

Step-by-step explanation:

When the distribution is normal, we use 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.

Determine which test the student did better on.

He did better on whichever test he had the higher z-score.

SAT:

Scored 1070, so X = 1070

SAT scores have a mean of 950 and a standard deviation of 155. This means that \mu = 950, \sigma = 155.

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

Z = \frac{1070 - 950}{155}

Z = 0.77

ACT:

Scored 25, so X = 25

ACT scores have a mean of 22 and a standard deviation of 4. This means that \mu = 22, \sigma = 4

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

Z = \frac{25 - 22}{4}

Z = 0.75

Due to the higher z-score, he did better on the SAT.

8 0
3 years ago
What is the property of equality for AM = AM
Andrew [12]

Answer:

Reflexive

Step-by-step explanation:

When a=a, it is called the reflexive property

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a=b b=c then a=c is the transitive property

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2 years ago
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olchik [2.2K]
The nearest tenth means 1 decimal place.
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Step-by-step explanation:

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3 years ago
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Ksenya-84 [330]

Answer

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step by step explanation

2×(c-2)

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2c-4

7 0
3 years ago
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