The number of seahorses is 4 times the number of sea urchins. there are 16 seahorses write and solve and equation to find how many seahorses are there.

Step-by-step explanation:

The correct question is

The number of seahorses is 4 times the number of sea urchins.There are 16 seahorses write and solve and equation to find how many sea urchins are there.

Let

x ----> the number of seahorses

y ----> the number of sea urchins

we know that

The number of seahorses is 4 times the number of sea urchins

so

-----> equation A

There are 16 seahorses

so

----> equation B

Solve the system by substitution

substitute equation B in equation A

solve for y

divide by 4 both sides

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150

60°

step-by-step explanation:

the measure angle of c in an isosceles triangle abc is 60° because in isosceles triangle,the measures of all the angles is 60°.