Which step should be completed first in the following problem 10 (8x 15 - 7 - 4 x3)?

Ben is three times as old as samantha, who is two years older than half of michel's age. if michel is 12. how old is ben?

Consider the proof. given: segment ab is parallel to line de. prove: what is the missing statement in step 5?

In parallelogram abcd the ratio of ab to bcis 5: 3. if the perimeter of abcd is 32 find ab