Question

]Question 1(Multiple Choice Worth 5 points)

Solve for x: 5x + 15 = 28

forty-three over five
thirteen over five
13
43
Question 2(Multiple Choice Worth 5 points)
When solving negative one over eight (x + 35) = −7, what is the correct sequence of operations?

Multiply each side by negative one over eight , add 35 to each side
Multiply each side by negative one over eight , subtract 35 from each side
Multiply each side by −8, subtract 35 from each side
Multiply each side by −8, add 35 to each side
Question 3(Multiple Choice Worth 5 points)
Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made.

−5x − 25 = 78
Step 1: −5x − 25 − 25 = 78 − 25
Step 2: −5x = 53
Step 3: negative five times x over negative five = fifty-three over negative five
Step 4: x = negative fifty-three over five

Step 1: She should have added 25 to each side.
Step 1: She should have divided both sides by −5.
Step 3: She should have divided both sides by −5.
Step 3: She should have multiplied both sides by −5.
Question 4(Multiple Choice Worth 5 points)
Solve for x: one over eight (8x + 15) = 24

9
49
one hundred seventy-seven over eight
two hundred seven over eight

Answer 1

X=2.6. Subtract 15 from both sides. You would get 5x = 13 then divide 5 from both sides to get x alone and you get 2.6

Answer 2

Question 1(Multiple Choice Worth 5 points)

Solve for x: 5x + 15 = 28

-15 -15

5X=13

/5 /5

X=13/5

forty-three over five

thirteen over five

13

43

Question 2(Multiple Choice Worth 5 points)

When solving negative one over eight (x + 35) = −7, what is the correct sequence of operations?

Multiply each side by negative one over eight , add 35 to each side

Multiply each side by negative one over eight , subtract 35 from each side

Multiply each side by −8, subtract 35 from each side

Multiply each side by −8, add 35 to each side

Question 3(Multiple Choice Worth 5 points)

Erica solved the equation −5x − 25 = 78; her work is shown below. Identify the error and where it was made.

−5x − 25 = 78

Step 1: −5x − 25 − 25 = 78 − 25

Step 2: −5x = 53

Step 3: negative five times x over negative five = fifty-three over negative five

Step 4: x = negative fifty-three over five

Step 1: She should have added 25 to each side.

Step 1: She should have divided both sides by −5.

Step 3: She should have divided both sides by −5.

Step 3: She should have multiplied both sides by −5.

Question 4(Multiple Choice Worth 5 points)

Solve for x: one over eight (8x + 15) = 24

9

49

one hundred seventy-seven over eight

two hundred seven over eight

Explanation: