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3 years ago

Little bit more math hw

Mathematics

1 answer:

Brut [27]3 years ago

5 0

Answer:

$x=-2$

Step-by-step explanation:

For these kind of problems, simply take the denominator and compare it to zero. Then solve the equation.

$x+2=0\\\\\Rightarrow x=-2$ By subtracting 2 from both sides!

Best Regards!

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B) 2(x-3) + X = 5x-2(x+5)

aleksandrvk [35]

Answer:

X=x−4

Step-by-step explanation:

2(x−3)+X=5x−2(x+5)

Use the distributive property to multiply 2 by x−3.

2x−6+X=5x−2(x+5)

Use the distributive property to multiply −2 by x+5.

2x−6+X=5x−2x−10

Combine 5x and −2x to get 3x.

2x−6+X=3x−10

Subtract 2x from both sides.

−6+X=3x−10−2x

Combine 3x and −2x to get x.

−6+X=x−10

Add 6 to both sides.

X=x−10+6

Add −10 and 6 to get −4.

X=x−4

4 0

3 years ago

Which equation is equivalent to 4x + y=12? A.y=-4x-32 B.y=-4x+12 c.y=4x+12 D.y=4x-3

Rama09 [41]

The answer is <span>y=-4x+12 because they just moved the 4x

</span>

6 0

3 years ago

Read 2 more answers

So me 3 ways you get to 100

In-s [12.5K]

10 x 10 = 100
20 + 20 + 20 + 20 +20 = 100
4 x 25 = 100

5 0

3 years ago

HELP PLEASE I DONT UNDERSTAND AND NEED TO PASS

Nina [5.8K]

Answer:

20 for de first one and answer (B) for the second.

Step-by-step explanation:

20 for de first one and answer (B) for the second.

hope this helped;3

7 0

3 years ago

According to an NRF survey conducted by BIGresearch, the average family spends about $237 on electronics (computers, cell phones

schepotkina [342]

Answer:

7.64% probability that they spend less than $160 on back-to-college electronics

Step-by-step explanation:

Problems of normally distributed samples 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.

In this problem, we have that:

$\mu = 237, \sigma = 54$

Probability that they spend less than $160 on back-to-college electronics

This is the pvalue of Z when X = 160. So

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

$Z = \frac{160 - 237}{54}$

$Z = -1.43$

$Z = -1.43$ has a pvalue of 0.0763

7.64% probability that they spend less than $160 on back-to-college electronics

4 0

3 years ago