Question

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?

Answer 1

Answer:

Question-

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?

Answer-

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.

Answer 2

Step-by-step explanation: Answer:

4 adult dinosaurs

12 baby dinosaurs

Step-by-step explanation:

Hi,

Let the number of baby dinosaurs be 'x'

Let the number of adult dinosaurs be 'y'

Given that there are 3 times as many baby dinosaurs as adult dinosaurs

=> x = 3y

Each baby dinosaur made 15 paintings,

=> Total number of paintings baby dinosaurs have made = 15x

Each adult dinosaur made 7 paintings,

=> Total number of paintings adult dinosaurs have made = 7y

Also, given total number of paintings = 208

=> 15x + 7y = 208

=>15*3y + 7y  = 208

=> 52y = 208

=> y = 4

and x = 12.

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