3 years ago

Please help due in 5 minutes !

Mathematics

1 answer:

Alexxx [7]3 years ago

4 0

It’s 8:1 hope this help

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Which is the equation of the line that passes through the points (4, 3) and (6, 2)?

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Answer:

answer is c hope this helps

Step-by-step explanation:

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Use distributive property to simplify (0.32x+5.3)+(0.5x+5.6)+(0.03x+0.2)

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the answer is

.85x+11.1

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QUESTION 3 of 10: Stock returns vary from year to year. The more variance a stock displays the greater the potential risk. These

Dahasolnce [82]

Answer:

The variance of these investment returns is 74

Step-by-step explanation:

Given:

Series = 10, 30, 15, 5, 20

To Find:

variance of a series = ?

Solution:

The variance of the series = $Var\left(X\right)=\sum _{i=1}^n\frac{\left(x_i-\bar{x}\right)^2}{n}$

$\bar{x} = \frac{10+30 +5+15 + 20}{5}$

$\bar{x} = \frac{80}{5}$

$\bar{x} =16$

Now $(x_i -\bar{x})^2 =$ $(10 -16)^2 + (30 -16)^2 + (5 -16)^2 +(15 -16)^2 +(20 -16)^2$

= $(-6)^2 + (14)^2 + (-11)^2 + (-1)^2+ (-4)^2$

= 36 + 196 +121 + 1+ 16

= 370

Now

$Var\left(X\right)=\frac{370}{5}$ = 74

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There are 62 girls in the 7th grade and 58 boys in the 8th grade. Each grade has 120 students. Which statement correctly compare

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7th grade: 62/120 of the class is made up of girls; (120-62)/120 of boys.
8th grade: 58/120 of the class is made up of boys; (120-58)/120 of girls.

Looking at the info for boys only: Compare (120-62)/120 with 58/120. What do you see?

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Rolf spent 15 hours last week practicing his saxophone. If 3/10 of the time was spent practicing warm-up routines, how much time

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Answer:

(3/10)*15= 9/2= 4.5 hours practicing warm up routines

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