Please answer this correctly

A (first one)

Step-by-step explanation:

If q is equal to 1/2, that would mean the first term is 10 x 1/2, or 5.

5 - 1/2 equal 4 1/2

last option

step-by-step explanation:

given that δdef is right and isoceles,

assuming that side df is the hypotenuse means that de an ef are the other 2 sides that intersect at 90° and are of equal length.

because they are of equal length, we can say that they are congruent

because they intersect at 90°, their slopes must be opposite reciprocals.

only the last option satisfies these conditions.

5   1/4   miles per hour

step-by-step explanation:

15   3/4 / 3 = 5   1/4