Which rate is a unit rate?

a. 48 minutes / 4 quarters
b. 40 hours / 5 days
c. 1 week / 7 days
d. 34 miles / 1 gallon

Aright triangle includes one angle that measures 30º. what is the measure of the third angle? a. 30º b. 90º c. 60º d. 130º

Find the values of the variables in the kite

Two years ago a man was six times as old as his daughter. in 18 years he will be twice as old as his daughter. determine their present ages.