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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

User Brendalee
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