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3 years ago

8. Write a multiplication expression that you can use to find

Mathematics

2 answers:

dalvyx [7]3 years ago

8 0

Answer:

random equation 8x5

Step-by-step explanation:

I really dont understand

-BARSIC- [3]3 years ago

3 0

Answer:

You didn't quite finish the question. Please explain the question or else you will be marked by Brainly for giving out the wrong information.

- Thank You,

Brainly HGF Bot

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9. What is the likelihood that a randomly selected couple's relationship survived between 90 and 150 days

andrew-mc [135]

Answer:

0.5818

Step-by-step explanation:

Suppose the average teenage romantic relationship is normally distributed with a mean number of 100 days with a standard deviation of 30 days.

Answer:

The z score is used to determine how many standard deviations that the raw score is above or below the mean. If the z score is positive then the raw score is above the mean and if it is negative then it is below the mean. It is given by:

$z=\frac{x-\mu}{\sigma}\\ \\where\ \mu=mean,\sigma=standard\ deviation, x=raw\ score$

Given that:

$\mu=100\ days,\sigma=30\ days\\\\For\ x=90\\\\z=\frac{90-100}{30} =-0.33\\\\For\ x=150\\\\z=\frac{150-100}{30} =1.67$

Therefore, from the normal distribution table, P(90 < x < 150) = P(-0.33 < z < 1.67) = P(z < 1.67) - P(z < -0.33) = 0.9525 - 0.3707 = 0.5818

7 0

2 years ago

Why are you allowed to move the decimal points before

Anna [14]

Answer:

If you move the decimal point the same number of places in the dividend and the divisor, you are multiplying them both by the same power of 10. That does not change the quotient

Step-by-step explanation:

6 0

3 years ago

1) Which statement is true about this argument?

oee [108]

The answer is b
Hope that helps

7 0

3 years ago

Eric’s average income for the first 4 months of the year is $1,450.25, what must be his average income for the remaining 8 month

netineya [11]

Too harddd sorryyybxnskzmskndjwjnekkks

6 0

2 years ago

What is an equation of the line that passes through the point (−3,−1) and is perpendicular to the line x-2y=6?

gogolik [260]

Answer:

y = 2x+5

Step-by-step explanation:

rearrange the equation to make y the sof

y = 1/2x - 3

to find gradient of perpendicular line

1/2 ÷ ( - 1 )

y = -2x + c , the replace the coordinates (-3,-1)

y = 2x + 5

5 0

2 years ago