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zheka24 [161]
3 years ago
5

How do you do 7-12 cause my math teacher sucks at explaining

Mathematics
1 answer:
Svetach [21]3 years ago
8 0

Answer:

-5

Step-by-step explanation:

imagine a numberline like

-13 -12 -11 -10 -9 -8 -7 -6 -5 -4 -3 -2- 1 0 1 2 3 4 5 6 7 8 9 10 11 12 13

see how its negative (-) and positive numbers

look at the number 7 and count back 12 to the left.

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Find the slope of the line that passes through the points (-6,-8) and (-6,12)
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A board is cut so that its length is changed from 8 feet to 6.5 feet. What is the percent of change in length? Round your answer
Schach [20]

it went from 8 to 6.5, namely 8 - 6.5 = 1.5.


if we take the 8 to be the 100%, what is 1.5 off of it in percentage?


\bf \begin{array}{ccll}amount&\%\\\cline{1-2}8&100\\1.5&x\end{array}\implies \cfrac{8}{1.5}=\cfrac{100}{x}\implies x=\cfrac{1.5\cdot 100}{8}\implies x=18.75


well, we can round that up to 18.8%, however since it's a subtraction from the board, we can say is -18.8%, a negative percent, because is a percent that was taken out of it.

3 0
3 years ago
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