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3 years ago

Help me please! I NEED TO HAND IT IN NOW

Mathematics

1 answer:

Finger [1]3 years ago

3 0

Answer:

4n + 4

Step-by-step explanation:

Azhar - n years old now.

Last year he was (n-1).

His mother was 4(n -1) last year.

Now his mother 4(n-1) + 1.

7 years later she will be 4(n - 1) + 1 + 7 = 4n - 4 + 8 = 4n + 4

You might be interested in

1. f(x) = x2 - 21<br> f(5)

matrenka [14]

Answer:

x=13

Step-by-step explanation:

if you will substitute the value of f(x) with 5, you will get the following equation:

5=2x-21

2x=26/÷2

x=13

(I didn't know what you ment when you wrote x2, is it x square or 2X)

I really hope it was the second one, cause that's how I solved it.

8 0

3 years ago

The transportation department is resurfacing 12.75 miles of roadways in Narvarro Country. The crew completes work on a 1/8-mile

steposvetlana [31]

Answer:

102 hours

Step-by-step explanation:

That would be 12 3/4 divided by 1/8 hours

= 51/4 / 1/8

= 51 * 8 / 4

= 408 / 4

= 102 hours

3 0

3 years ago

Which statement is the correct interpretation of the inequality –5 > –6? (1 point)

lilavasa [31]

Answer: OPTION D.

Step-by-step explanation:

The symbol of the inequality ">" means "greater than". Then, -5 is greater than -6.

If a negative number -a is greater than other negative number -b , then the distance between -a and zero is shorter than the distance between -b and zero.

You can see in the number line attached that -5 is closer to 0 than -6. Therefore, -5 is located to the right of -6.

5 0

3 years ago

Mariah Jacobsen is the marketing manager at ABC Electronics, a major consumer electronics supplier in the northwest. Over the la

o-na [289]

Answer:

0.6568 = 65.68% probability that she would be correct.

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.

45000, 45500, 44500, 46000 and 44000 units. This rate of sales is considered average for the product over the last twenty years or so.

This means that:

$\mu = \frac{45000 + 45500 + 44500 + 46000 + 44000}{5} = 45000$

Standard deviation of 1500 units.

This means that $\sigma = 1500$

What is the likelihood that she would be correct if she predicts sales between 43000 and 46000?

This is the pvalue of Z when X = 46000 subtracted by the pvalue of Z when X = 43000. So

X = 46000

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

$Z = \frac{46000 - 45000}{1500}$

$Z = 0.67$

$Z = 0.67$ has a pvalue of 0.7486

X = 43000

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

$Z = \frac{43000 - 45000}{1500}$

$Z = -1.33$

$Z = -1.33$ has a pvalue of 0.0918

0.7486 - 0.0918 = 0.6568

0.6568 = 65.68% probability that she would be correct.

5 0

3 years ago

Please help me I need help with my test review I can’t figure out m<1 and m<2

aksik [14]

Answer:

m1=12 and m2=168

Step-by-step explanation:

$m1 + m2 = 180 \: (straight \: angle) \\ then \\ x - 12 + 7x = 180 \\ 8x - 12 = 180 \\ 8x = 180 + 12 = 192 \\ x = 192\div 8 \\ x = 24\\ hence \\ m1 = 24 - 12 = 12 \\ m2 = 7 \times 24 = 168.$

6 0

3 years ago

Help me please! I NEED TO HAND IT IN NOW ​

Help me please! I NEED TO HAND IT IN NOW