Which is the value of 3b2-b when b=5?
a.20
b.25
c.70
d.75

3b2-b, we can re-write it as 6b-b

Now, substitute for b=5,

6(5)-5 = 30-5 =25

SO, OPTION B WOULD BE THE ANSWER.

 The correct option is (c) 70.

Step-by-step explanation:  We are given to find the value of the following expression for b = 5 :

To find the value of the expression (i) at b = 5, we need to substitute b = 5 in (i).

Substituting b = 5 in (i), we get

Thus, the required value of the the given expression is 70.

Option (c) is CORRECT.

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.

50- 250 is correct i did that one too

step-by-step explanation: