In this figure, ab and cd are parallel.
ab is perpendicular to line segment _ . if the length of ef is a units, then the length of gh is _ units.
blank 1:
cf
fh
dh
gh
blank 2:
a
b
a+b
a-b

Prove that the value of the expression 7^8–7^7+7^6 is divisible by 43.

How many 3/8s are in 6 plz someone tell me now

The temperature of a chemical solution is originally 21 ? c . a chemist heats the solution at a constant rate, and the temperature of the solution 75 ? c after 1212 12 minutes of heating. the temperature, tt t , of the solution in ? c is a function of x , the heating time in minutes. write the function's formula.