What is the area of this trapezoid? 50 in²

100 in²

150 in²

200 in²

heelp (im gonna have a test on this and i need yall to explain this to mee-so i can understand-what to do)

Explain how you can use the associative property to evaluate (7x50)x4.

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?

Given the two similar triangles, how do i find the missing length? if a=4, b=5, and b'=7.5 find a'