2x+8y=54

x+9y=67

Solve the system by subtitution

500 reduced my 2 times my age is 300

What is 10x 48 = 304

A rock breaks loose from a cliff and plunges toward the ground 400 feet below. The distance "d" that the rock falls in "t" seconds is given by the equation d=16t^2. How long does it take the rock to hit the ground?

Is six ninth equal to eight twelths?

A math club has 25 members, of which 11 are males and the rest are females. What is the ratio of males to all club members?

Volume of a cone Radius = 4 height = 12

Ann and Betty shared a sum of money in the ratio 2:3 respectively. Ann received $120. What is Betty's share?

Mark has 21 coins in his pocket consisting of quarters, dimes, nickels, and pennies. He has at least one of each. The total amount of marks change is one dollar. How many of each coin does he have?

A study funded by the National Center for Complemnetary and Alternative Medicine found that echinacea was not an effective treatment for colds in children. The experiment involved echinacea treatments and placebos, and blinding was used.

What is 36/25 simplified