Astudent is asked to calculate the value of 752 − 702 using the identity x2 − y2 = (x − y)(x + y). the student's steps are shown below.

step 1: 752 − 702 = (75 − 70)(75 + 70)

step 2: = (5)(155)

step 3: = (5)(150) + 5(5)

step 4: = 750 + 25

step 5: = 775

the correct answer should be 725. in which step did the student make his first error?
step 1
step 2
step 3

Abox contains 1 plain pencil and 4 pens. a second box contains 5 color pencils and 5 crayons. one item from each box is chosen at random. what is the probability that a plain pencil from the first box and a color pencil from the second box are selected? write your answer as a fraction in simplest form.

Can someone me do math because i am having a breakdown rn because i don’t get it

Hii1977 cleaner shrimp are a species of shrimp that clean parasites from other organisms. fish allow the shrimp to eat the parasites in their mouth. the shrimp get a source of nutrition. the relationship between the shrimp and the fish is this association indicates that for the smaill aneser arecommensal,mutualistic,or parasitic for the begger one the anser are the shrimp and fish benefit each other , the shrimp harm the fish, or the fish do not benetit from the shrimp