I need to know how to answer this.
7-8b where b=-3 Please help. I have two different answers
Substitute b and solve:
7-8(-3)
7+24 (-8 x -3 = + 24)
31
To find the value of 7-8b when b=-3, you can substitute -3 for b in the expression and simplify.
Start with the expression 7-8b, and substitute b with -3:
7-8(-3)
Next, apply the rule of signs to multiply -8 and -3. When multiplying two negative numbers, the result is positive:
7+24
Now, simply add 7 and 24 to get the final answer:
31
Therefore, the value of 7-8b, where b=-3, is equal to 31.