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2 years ago

PLEASE HELP!!! Solve for x: 3 over quantity x minus 4 equals 7 over x

Mathematics

1 answer:

uranmaximum [27]2 years ago

4 0

Answer:

Solve for x

Multiply in cross

distributive property right side

subtract 3x both sides

Adds 28 both sides

Divide by 4 both sides and rewrite

Step-by-step explanation:

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Find the value of 4x2 + 2y where y= 0.5 and x= 3

Citrus2011 [14]

Answer:

Step-by-step explanation:

substitute the given values for x and y into the expression

4x² + 2y

= 4(3)² + 2( $\frac{1}{2}$ )

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3 years ago

A set of data items is normally distributed with a mean of 400 and a standard deviation of 60. Find the data item in this distri

Softa [21]

Answer:

The data item is $X = 580$

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.

Mean of 400 and a standard deviation of 60.

This means that $\mu = 400, \sigma = 60$

z=3

We have to find X when Z = 3. So

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

$3 = \frac{X - 400}{60}$

$X - 400 = 3*60$

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3 years ago

When a certain number is divided by 25 the result is 32 reminder 17 . What is the number

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Multiply 25 by 32 then add 17:

25 x 32 = 800

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2 years ago

What is another equivalent expression for -3(7 +5g)

Ilya [14]

Answer:

-21 - 15g

Step-by-step explanation:

You just have to distribute the -3 into the expression.

-3(7 + 5g) = -21 -15g

⇒

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