Question

1. (L70) Is the following sentence true?

The fraction bar can be used to show the order of operations.
A. Yes
B. No
C. Maybe
D. Sometimes
E. Not applicable
2. (L72) Is the following sentence true?
In solving the equation 4(x – 9) = 24, we should first undo the subtraction by adding 9 to
each side.
A. Yes
B. No
C. Maybe
D. Sometimes
E. Not applicable
3. (L70) Find the value of this expression: –
60
5
+ 30. (Make sure to do the operations in the correct order.)
A. 18
B. 20
C. 23
D. 28
E. None of the above
4. (L68) Find the value of this expression: 10 + 8 × 5. (Make sure to do the operations in the
correct order.)
A. 45
B. 50
C. 55
D. 60
E. None of the above
5. (L68) Find the value of this expression: –5(7 + 1). (Make sure to do the operations in the correct order.)
A. –34
B. –36
C. 36
D. –40
E. None of the above
6. (L13) Multiply these fractions, and make sure the answer is fully reduced:
15
35
×
28
9
A. 3
4
B. 4
3
C. 4
5
D. 5
4
E. None of the above

Answer 1

The fraction bar can be used to show the order of operations. In the equation 4(x – 9) = 24, we should first undo the subtraction by adding 9 to each side. To find the value of the expression -60/5 + 30, divide -60 by 5 and add 30.

Step-by-step explanation:

1. The fraction bar can be used to show the order of operations. - Yes
2. In solving the equation 4(x – 9) = 24, we should first undo the subtraction by adding 9 to each side. - No
3. To find the value of the expression -60/5 + 30, we need to first divide -60 by 5 which gives us -12. Then we add 30 to -12 to get the final value of 18. - A. 18
4. To find the value of the expression 10 + 8 × 5, we need to multiply 8 by 5 which gives us 40. Then we add 10 to 40 to get the final value of 50. - B. 50
5. To find the value of the expression -5(7 + 1), we need to first simplify the expression within parentheses which gives us -5(8). Then we multiply -5 by 8 to get -40. - D. -40
6. To multiply the fractions 15/35 and 28/9, we multiply the numerators together to get 420 and the denominators together to get 315. Finally, we simplify the fraction to get the answer 4/3. - B. 4/3