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liraira [26]
4 years ago
7

If the slope of line L is -2/5, what is the slope of line m so that line l and line m are perpendicular?

Mathematics
1 answer:
ki77a [65]4 years ago
3 0
Perpendicular lines have negative reciprocal slopes. So if the slope is -2/5...to find the negative reciprocal, " flip " the slope and change the sign.
So we flip -2/5 and we get 5/-2...and now we change the sign...and we get 5/2. So our perpendicular slope will be 5/2.
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At the beginning of a class period, half of the students in a class go to the library. Later in the period, half of the remainin
mash [69]

<u>Answer:</u>

32 students

<u>Step-by-step explanation:</u>

We are given that at the beginning of a class period, half of the students in a class go to the library and half of the remaining to the computer lab.

Given that there are 8 students remaining, we are to find the total number of students in the class initially.

At beginning = x students

After half of them leave = \frac{x}{2} students

After half of the remaining leave = \frac{x}{4} students

So, \frac{x}{4} = 8

x=8\times 4

x = 32

Therefore, there were 32 students in the class originally.

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What is the quotient of a number and 6 decreased by 10 = 2?
victus00 [196]
Answer:

<span>−84</span>

Explanation:

Let x be the unknown number.

From the queston we can form the equation

<span><span>x<span>(−7)</span></span>−2=10</span>

Move <span>−2</span> to the right hand side

<span><span><span>x<span>(−7)</span></span>=10+2</span><span><span>x<span>(−7)</span></span>=12</span></span>

Multiply both sides by <span>−7</span> to get the unkonwn no.

<span><span><span>−7</span>⋅<span>x<span>(−7)</span></span>=12⋅<span>(−7)</span></span><span>x=−84</span></span>



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