Solve for u.
Simplify your answer as much as possible.

Step-by-step explanation:

2/8 = u/12

cross multiply and we get:

24= 8u

u = 3

Topic: algebraic fractions

If you like to venture further, do check out my insta (learntionary) where I regularly post useful math tips! Thank you!

add an image, and i will answer

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.