Blue book test math questions..need help!

khoitrinh
Sun, 17 Aug 2008 19:55:12 +0000

17

Solve the equation for y.
y = sqrt(x+4) and y = -sqrt(x+4)
The highest slope occurs when the first point is at the lower value and the second point is at the higher value. Therefore the points are (0,-2) and (5,3).
The slope formula gives a slope of 5/5.

So the answer is 1.

18

Let us define x as the distance one way.
x/45 = time to get there
x/30 = time to get back
x/45+x/30 = 1 hour
75x/1350 = 1
x = 18

So the answer is 18.