Question

How do I set up proportion’s and also cross multiply

Answer 1

u transpose all the constans to one side of the '=' sign and solve

Explanation:

for example,

in the first question

the sides of the triangles are proportional then,

25/30 = x/ 10

=> (25x10)/30 = x

=> 250/30 = x

=> 8.33

im pretty sure like this u can do the rest, ;)