Question

Hi! I need some help with a few algebra questions. If anyone could help me, that would be awesome! I'll give you a medal and become a fan. :)

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If y varies directly with x and y = -7 when x = -1, find x when y = -84.
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Write the point-slope equation of the line through (-2, 1) with a slope of 3.
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Write the equation y - 2 = 4(x + 5) in standard form.
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Thank you so much! :)

Answer 1

If y varies directly with x and y = -7 when x = -1, find x when y = -84.
When x=-1 y=-7
-84+77=-7
We changed y with -77 and as it varies directly, x changes with this same amount.
-1-77=-78=x

Write the point-slope equation of the line through (-2, 1) with a slope of 3.
Check the formula, this should not be hard to do...

Write the equation y - 2 = 4(x + 5) in standard form.
Standard form is y=ax+b
Expand the bracket and add 2 to both sides and you have it

Answer 2

@Andras Thank you so much for your help :)