Math
posted by Anonymous .
*not multiple choice*
u^3 = 1/125
y  1 = 4y  2/3 * not sure how to do
this
what is the y intercept of the line?
y= 3x  5 * my answer is 5
when 40 is added to the number miles she ran last week..the result is the same as adding 10 to 4 times the number she ran last week. * not sure how to do this, because I have to find the miles she ran last week.
what is the slope of the line 4y  6x + 12 = 0 in simplest form? * not sure how to do this

Math 
Steve
u^3 = 1/125
u^3 = 5^3
u = 5
y1 = 4y  2/3
3y3 = 12y2
9y = 1
y = 1/9
The yintercept is where x=0. Clearly when x=0, y = 5, not 5.
If she ran x miles, then we know that
x+40 = 10+4x
x = 10
If you want the slope, try writing the equation is slopeintercept form:
4x6y+12 = 0
6y = 4x+12
y = 4/6 x + 2
So, the slope is 4/6 or 2/3
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