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bixtya [17]
3 years ago
9

PLEASE HELP!!

Mathematics
1 answer:
Lapatulllka [165]3 years ago
7 0

Step-by-step explanation:

Convert the equation to the slope-intercept form (y = mx + b):

-5x-3y=-7              <em>add 5x to both sides</em>

-3y=5x-7              <em>divide both sides by (-3)</em>

y=-\dfrac{5}{3}x+\dfrac{7}{3}

Choose any three values of x ​​and calculate the values od y:

for x = -1:

y=-\dfrac{5}{3}(-1)+\dfrac{7}{3}=\dfrac{5}{3}+\dfrac{7}{3}=\dfrac{12}{3}=4\to(-1,\ 4)

for x = 2:

y=-\dfrac{5}{3}(2)+\dfrac{7}{3}=-\dfrac{10}{3}+\dfrac{7}{3}=-\dfrac{3}{3}=-1\to(2,\ -1)

for x = 5

y=-\dfrac{5}{3}(5)+\dfrac{7}{3}=-\dfrac{25}{3}+\dfrac{7}{3}=-\dfrac{18}{3}=-6\to(5,\ -6)

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We know that the temperature /was/ -3, so it was 3 under zero. It has /risen/ by 8, meaning we have added 8 degrees to whatever the starting temperature was.

We can find out how much the temperature is right now: it was -3, went through -2, -1, 0, 1, 2, 3, 4, and now its at 5 degrees. Thats risen by 8 degrees, right? And -3+8 is the same as 8-3 (commutative property of addition, since we basically did 8+(-3)) which equals 5, so we know that we got the correct answer. :)



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