Answer:
6. C. 4x-7
7. B. 417.6
8. 138.98
Step-by-step explanation:
6) (7x-5) - (3x-2)
7x-5 - 3x+2
distribute the -1 from the middle into (3x-2) which only changes the signs
7x-5 - 3x+2
collect like terms (7x and -3x) as well as (-5 and 2)
Answer---> 4x-3
7) 0.5x+78.2=287
-78.2 -78.2
move the constant to the right side and change it's sign
0.5x=287-78.2
--> 0.5x= 208.8
Subtract the numbers on the right hand side
0.5x= 208.8
------ --------
0.5x 0.5x
divide both side of the equation by 0.5
answer ---> x= 417.6
8) Given: Graham's monthly bank statement with deposits and withdrawals:
-25.20,−25.20,52.75,-22.04,−22.04,-8.50,$94.11
If Graham's balance in the account was $47.86 at the beginning of the month .
Then the account balance at the end of the month =
=47.86+(-25.20+ 52.75- 22.04- 8.50+ 94.11)
=47.86+(52.75 + 94.11 − 25.20− 22.04− 8.50)
=47.86+(146.86− 55.74)
47.86+(91.12)=47.86+91.12= 138.98
Thus, the account balance at the end of the month= $138.98