A herd of dinosaurs made paintings in the sand with their claws. Each baby dinosaur made 15 paintings and each adult dinosaur made 7 paintings. The entire herd made 208 paintings in total, and there were 3 times as many baby dinosaurs as adult dinosaurs. How many baby dinosaurs and adult dinosaurs were there?
A herd of dinosaurs made paintings in the sand with their claws. Each baby dinosaur made 15 paintings and each adult dinosaur made 7 paintings. The entire herd made 208 paintings in total, and there were 3 times as many baby dinosaurs as adult dinosaurs. How many baby dinosaurs and adult dinosaurs were there?
Let the number of adult dinosaurs = D
Then the number of baby dinosaurs =3D
7D + 3D(15) = 208
7D +45D = 208
52D = 208 divide both sides by 52
D = 208 / 52
D = 4 Adult dinosaurs,
4 x 3 =12 Baby dinosaurs.
