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Igoryamba
4 years ago
7

"Reference this problem to answer the 5 questions that follow it (Each question is worth 1 point):"

Mathematics
1 answer:
iogann1982 [59]4 years ago
7 0

Answer:

B, E

Step-by-step explanation:

Given expression

-2.5(1-2n)-1.5n

First, use the distributive property:

-2.5(1-2n)-1.5n\\ \\=-2.5\cdot 1-2.5\cdot (-2n)-1.5n\\ \\=-2.5+5n-1.5n

Use distributive property once more:

-2.5+5n-1.5n\\ \\=-2.5+n(5-1.5)

So, option E is correct.

Now,

-2.5+n(5-1.5)\\ \\=-2.5+n\cdot 3.5\\ \\=-2.5+3.5n

Thus, option B is correct

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Use properties to evaluate 2/3 • (- 3/4 / 1/8) 1/3<br><br> A.-4<br> B. 4<br> C.-4/3<br> D.4/3
Bond [772]

Answer:

Step-by-step explanation:

First you do the division in parentheses and you get (-3/4*8/1) = -24/4 = -6

The new exercise becomes 2/3 *(-6)*1/3

Next, since there are only multiplication we have to do then in order from left to right so we have

-12/3*1/3 = -12/9

We can simplify by 3 and we get -4/3

Anwer choice C

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3 years ago
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Vinil7 [7]

Answer:

<em>Yes</em>

Step-by-step explanation:

The ratio for Danny would be 3 / 6 which simplifies to 1 / 2

For Jeff the ratio would be 2 / 4 which simplifies to 1 / 2 as well

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3 years ago
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Andre45 [30]

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Step-by-step explanation:

3 0
3 years ago
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svetlana [45]
4(-3)-9 =-21. I hope this helpsss
7 0
3 years ago
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Ymorist [56]

Answer:

The slope of AB is undefined; the slope of CD is 0; The lines are perpendicular.

Step-by-step explanation:

Line AB would form a vertical line. Slope is Δy/Δx. To go from 3 to 7 (the y-coordinates) you need to go up 4 units. So we would then have Δy/Δx = 4/Δx. To go from -5 to -5 (the x-coordinates) we have to go left or right 0 units. So, Δy/Δx = 4/Δx = 4/0. Anything divided by 0 is undefined. <em>Remember: vertical lines always have an undefined slope.</em>

Line CD would form a horizontal line. To go from 9 to 9 (the y-coordinates) you need to go up or down 0 units. So, Δy/Δx = 0/Δx. To go from 1 to -10 (the x-coordinates) you need to go down 11 units. So Δy/Δx = 0/Δx = 0/1. 0 divided by anything is 0. <em>Remember: horizontal lines always have a slope of 0.</em>

If you picture a horizontal line and a vertical line intersecting, they would both form a right angle when they intersect.  By definition, this would make both lines perpendicular.

8 0
3 years ago
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