There are 5 bikes in each bike rack at the school. there are 6 bikes racks. how many bikes are in the bike racks?

5 bikes for each rack,

there are 6 racks

5 x 6 = 30

there are 30 bikes in the bike racks

check the picture below.

well, the angle at the vertex d is clearly not a right-angle, let's check for the one at the vertex f which does look like,   however if it's indeed, that means ef is perpendicular to df, in which case their slopes will be negative reciprocal of each other.

so the negative reciprocal of the slope of ef is 1, however the slope of df is not 1, is 1/2, so nope, they're not perpendicular lines.

step-by-step explanation:

the true statements are:

r = set of real numbers

n = set of natural numbers, 1,2,

w = n u{0} = {0,1,}