MATH 1280 FINAL EXAM | QUESTIONS AND ANSWERS |
VERIFIED AND WELL DETAILED ANSWERS | LATEST
UPDATE
Duncan shares 20 percent of all of his sales commissions with his
personal assistant. If Duncan earns x dollars in commissions and
gives his assistant y dollars, which equation correctly models this
situation?
y = 0.20x
A car travels 18 miles per gallon of gas used. Which
equation best represents the proportional relationship between
the y miles that the car has traveled and the x gallons of gasoline
that it has used?
y = 18x
What is the sale price of a phone that was originally $199 but that
has been marked down by 15 percent?
$169.15
A bookstore bought a case of 10 books at a wholesale price of $84.
The bookstore will sell the books at a 25 percent markup, and each
book will be sold for the same amount. How much will they sell each
book in the case for?
$10.50
Selina and three of her classmates each wrote out the steps for
finding an approximate percent change. They all agreed on the first
,and fourth step:1. Find the positive difference between the original
number and the new number.2. ________________________3.
________________________4. Round the answer if necessary.They
did not agree on steps 2 and 3. Which instructions are correct for
steps 2 and 3?
2. Divide the difference by the original number. 3. Multiply the
quotient by 100 to change it from a decimal to a percent.
When Nancy started middle school, she was 60 inches tall. When she
started high school, she was 66 inches tall. What was the percent
change in her height?
10 percent increase
Matthew plots an integer on a number line that has an absolute
value of 119. Gabrielle plots a different integer on the same number
line that also has an absolute value of 119. Which two integers could
Matthew and Gabrielle have plotted?
119 and -119
Chris is standing on a cliff that is 3 feet above sea level. He dives into
the water and descends to a depth 10 feet below the surface of the
sea. On a number line, what is the distance between the two
elevations?
13
What is the value of the expression below?
-50 + 51
1
, Julio predicted that the average high temperature for January
would be . The actual average high temperature was 4 degrees
higher than Julio's prediction. Which describes the actual average
high temperature for January?
-3 C
Allison is evaluating the expression -5 - (-2) using integer tiles. She
begins with 5 negative tiles as shown.
What should Allison do next to find the value of the expression?
remove 2 negative tiles
Laura determined the difference between 8 and -2 using the additive
inverse. Her steps are shown below.
8 - (-2) = -8 + 2 = -6
Which best describes the error in Laura's work?
The 8 should have remained positive.
What is the product of (9) (-9) (-1)?
81
For 6 consecutive days, Alejandro studied for 5 minutes more each
day than he did the previous day. Which best represents the change
in the amount of time that Alejandro studied on the first day to the
amount of time he studied on the last day?
30 minutes
Enrique says 0.4 repeating is a rational number. Which of the
following best describes whether Enrique is correct and why?
VERIFIED AND WELL DETAILED ANSWERS | LATEST
UPDATE
Duncan shares 20 percent of all of his sales commissions with his
personal assistant. If Duncan earns x dollars in commissions and
gives his assistant y dollars, which equation correctly models this
situation?
y = 0.20x
A car travels 18 miles per gallon of gas used. Which
equation best represents the proportional relationship between
the y miles that the car has traveled and the x gallons of gasoline
that it has used?
y = 18x
What is the sale price of a phone that was originally $199 but that
has been marked down by 15 percent?
$169.15
A bookstore bought a case of 10 books at a wholesale price of $84.
The bookstore will sell the books at a 25 percent markup, and each
book will be sold for the same amount. How much will they sell each
book in the case for?
$10.50
Selina and three of her classmates each wrote out the steps for
finding an approximate percent change. They all agreed on the first
,and fourth step:1. Find the positive difference between the original
number and the new number.2. ________________________3.
________________________4. Round the answer if necessary.They
did not agree on steps 2 and 3. Which instructions are correct for
steps 2 and 3?
2. Divide the difference by the original number. 3. Multiply the
quotient by 100 to change it from a decimal to a percent.
When Nancy started middle school, she was 60 inches tall. When she
started high school, she was 66 inches tall. What was the percent
change in her height?
10 percent increase
Matthew plots an integer on a number line that has an absolute
value of 119. Gabrielle plots a different integer on the same number
line that also has an absolute value of 119. Which two integers could
Matthew and Gabrielle have plotted?
119 and -119
Chris is standing on a cliff that is 3 feet above sea level. He dives into
the water and descends to a depth 10 feet below the surface of the
sea. On a number line, what is the distance between the two
elevations?
13
What is the value of the expression below?
-50 + 51
1
, Julio predicted that the average high temperature for January
would be . The actual average high temperature was 4 degrees
higher than Julio's prediction. Which describes the actual average
high temperature for January?
-3 C
Allison is evaluating the expression -5 - (-2) using integer tiles. She
begins with 5 negative tiles as shown.
What should Allison do next to find the value of the expression?
remove 2 negative tiles
Laura determined the difference between 8 and -2 using the additive
inverse. Her steps are shown below.
8 - (-2) = -8 + 2 = -6
Which best describes the error in Laura's work?
The 8 should have remained positive.
What is the product of (9) (-9) (-1)?
81
For 6 consecutive days, Alejandro studied for 5 minutes more each
day than he did the previous day. Which best represents the change
in the amount of time that Alejandro studied on the first day to the
amount of time he studied on the last day?
30 minutes
Enrique says 0.4 repeating is a rational number. Which of the
following best describes whether Enrique is correct and why?
