Answers Common Core Math 7 - MA3107 CRFinding an Original Amount

Finding an Original Amount — Unit test Answers

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Julia is evaluating the expression . If she uses the distributive property to rewrite the expression with friendlier numbers, which expression can be a step in her work?

17 (2) + 17 (72)

17 (2) times 17 (72)

17 (100) + 17 (40) + 17 (4)

17 (100) times 17 (40) times 17 (4)

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Carly withdraws $18 from her bank account. Which number line represents this amount?

A number line going from negative 20 to positive 20. A point is at 18.

A number line going from negative 20 to positive 20. A point is at 12.

A number line going from negative 20 to positive 20. A point is at negative 12.

A number line going from negative 20 to positive 20. A point is at negative 18.

Which statement illustrates the distributive property?

3 (4 + 5) = 3 (4) + 5

3 (4 + 5) = 3 (4) + 3 (5)

3 left-bracket (4) (5) right-bracket = 3 (4) + 3 (5)

3 left-bracket (4) (5) right-bracket = Left-bracket 3 (4) right-bracket + Left-bracket 3 (5) Right-bracket

Using the order of operations, what should be done first to evaluate ?

Subtract 5 from 2.

Divide 6 by –3.

Add –3 and 4.

Multiply 4 and 2.

What is the quotient?

–30

–6

How do the expressions and compare when they are evaluated?

They have different values and are different signs.

They have different values but are the same sign.

They have the same value but are different signs.

They have the same value and the same sign.

The Nash family spent a total of $240 on a hotel room for 3 nights. Which equation can be used to find c, the average cost per night for the hotel room?

c times 240 = 3

c divided by 240 = 3

240 times 3 = c

240 divided by 3 = c

Vicky records the low temperature for three consecutive days. Between the first and second days the temperature increased 6 degrees. Between the second and third days the temperature decreased 3 degrees. On the third day the low temperature was –6º. What was the low temperature on the first day?

–15 degrees

–9 degrees

–3 degrees

3 degrees

How is the product of 2 and –5 shown using integer tiles?

2 positive tiles and 5 negative tiles.

2 negative tiles and 5 positive tiles.

5 negative tiles and 5 negative tiles.

5 positive tiles and 5 positive tiles.

Using the order of operations, what should be done first to evaluate ?

Subtract 7 from –5.

Multiply 8 and 3.

Divide 7 by 2.

Add 6 and –5.

Jerry is comparing –8 and –10 on a number line. Which is true regarding their locations on the number line?

–8 is greater than –10 because –8 is to the left of –10 on a number line.

–8 is greater than –10 because –8 is to the right of –10 on a number line.

–8 is less than –10 because –8 is to the left of –10 on a number line.

–8 is less than –10 because –8 is to the right of –10 on a number line.

Paloma plotted two different integers with the same absolute value on a number line. The distance between the two numbers must be

zero.

the absolute value of either number.

twice the distance between either number and zero.

the sum of the two numbers.

Helene, a hiker, starts at an elevation of 27 feet above sea level and descends 32 feet during her hike to base camp. Which describes the elevation of base camp?

5 feet above sea level

5 feet below sea level

59 feet above sea level

59 feet below sea level

Which expression is modeled by this arrangement of tiles?