If ad=12 and ac=4y-36 find the value of y

Shane can shovel the driveway in 4 hours, but if his sister it would take 2 hours. how long would it take taylor to shovel the driveway alone

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days

Grandpa ernie is shrinking! over the past 4 years his height decreased by a total of 2.4 cm.it decreased by the same amount each year. what was the change in grandpa ernie's height each year