Which expression has the same value as (7a-2)+(a-4)
A)8a-6
B)6a+8
C)7a-2
D)8a+8
(7a - 2) + (a - 4)
Combine like terms. What do you think the answer is?
I don't know how to combine it
7a + a = 8a
-2 + -4 = -6
8a - 6
To find the expression that has the same value as (7a-2) + (a-4), we need to simplify the given expression first.
Using the distributive property, we can remove the parentheses by adding like terms. Combine the terms with 'a' and the constant terms separately:
(7a - 2) + (a - 4)
7a + a - 2 - 4
(7a + a) + (-2 - 4)
8a - 6
So the simplified expression is 8a - 6.
Now, we can compare this simplified expression to the answer choices:
A) 8a - 6: This expression matches the simplified expression.
B) 6a + 8: This expression does not match the simplified expression.
C) 7a - 2: This expression does not match the simplified expression.
D) 8a + 8: This expression does not match the simplified expression.
Therefore, the expression that has the same value as (7a-2) + (a-4) is 8a - 6, which is option A.