3 years ago

-17 + 20 + (-3) SOMEBODY HELP ME PLS ASAP

Mathematics

1 answer:

harkovskaia [24]3 years ago

8 0

Answer:

Step-by-step explanation:

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Dang why is TTM so hard also PLEASE HELP!!!!!!

34kurt

Correct answer is right down, increase gives sign +, drop or decrease gives sign -

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3 years ago

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Are (2,9) and (-3,-6) both on the line y = 4x + 6? If not, find an equation for the line that does pass through both points.

igor_vitrenko [27]

Answer:

no, y=3x+3

Step-by-step explanation:

plug both points into the equations:

9=4*2 +6 -> 9=8+6, doesn't work
-6=4(-3)+6 -> -6=-6, works

one works but the other doesn't so now we find a line through both points

use the formula (y_2-y_1)/(x_2-x_1) to find the slope:

(-6-9)/(-3-2)=-15/-5=3

y=3x+b, plug in a point to find b:

9=3(2)+b
9=6+b
b=3
y=3x+3

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3 years ago

Solve for x ax=b This is for Algebra 1

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The answer to this is x= b/a

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3 years ago

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Solve for e. (-7) = e/3 + 14

raketka [301]

(-7) = e/3 + 14

Subtract 14 on both sides

-7 - 14 = e/3 + 14 - 14

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Multiply by 3 on both sides

-21 * 3 = e/3 * 3

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3 years ago

According to a report from a business intelligence company, smartphone owners are using an average of 20 apps per month Assume t

Eddi Din [679]

Answer: 0.547

Step-by-step explanation:

As per given , we have

Population mean = $\mu=20$

Population standard deviation= $\sigma=4$

Sample size : n= 36

We assume that number of apps used per month by smartphone owners is normally distributed.

Let $\overline{x}$ be the sample mean.

Formula : $z=\dfrac{\overline{x}-\mu}{\dfrac{\sigma}{\sqrt{n}}}$

The probability that the sample mean is between 19.5 and 20.5 :-

$P(19.5$

[using standard normal distribution table for z]

Hence, the required probability = 0.547

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3 years ago