Can someone give me a hand with these? I'm at a total loss.
View problems here.
Then a word problem (these always throw me in a loop).
Then a word problem too: "The height of a triangle is 4 inches less than the base. The area is 30 square inches. Find the height."
First, factor the numerator of the first fraction:
Multiply, then simplify:
Your second problem is a little difficult to read. I'll venture a guess:
If this is not exactly it, you can still use it as a model.
First, multiply by the least common multiple of the divisors to clear the fractions.
Subtract 75 from both sides and then divide by -6 and you're done.
Now, onto your last one.
This is already in slope-intercept form, so we can easily tell that the slope is
Now, you want the slope of a line that is perpendicular to this one, so we must use the negative reciprocal of this slope.
The negative reciprocal of is
Using point (-1, 4) and our newly acquired slope of , we can use the point slope form of the linear equation to find our required equation.
It's just a matter of substitution now.