Find the values. For what values of y does the binomial 21-3y have a negative value

Part A

We need to determine values of x for which 2x−1 is positive

⇒ 2x - 1 > 0

⇒ 2x > 1

⇒ x >  

Hence, for all values of x that are greater than , the binomial 2x-1 is positive

Part B

We need to determine values of y for which 21−37 is negative

⇒ 21-3y < 0

⇒ 21 < 3y

⇒ 7 < y

Hence, for all values of y that are greater than 7, the binomial 21-37 is negative

Part C

We need to determine values of c for which 5−3c is greater than 80

⇒ 5-3c > 80

⇒ -3c > 75

⇒ -c > 25

⇒ c < -25

Hence, for all values of c that are less than -25, the binomial 5-3c is greater than 80

fist on the left goes with the third on the right. second on the left goes with the fourth on the right. third on the left goes with the second on the right. the fourth on the left goes with first on the right