Exactly half of these integers are odd (1, 3, 5, ..., 29) so the probability of selecting an odd number is

.
Y=-4x because all you have to do is move the variable to the right by adding its opposite to both sides. So 4x+y-4x=0-4x. Then eliminate the opposites y=0-4x
Your welcome
In order to derive the base of a triangle from its area, you need its height as well.
In fact, if we solve the area formula for the base, we have

So, the base length would be

where h is the height relative to the base you're interested in.
If the expression is: yⁿ
then y is the Base.
If the expression is: yn
then y is the product.