Chapter 3 review -- 7th grade

The first year, an SUV was worth $43,500. Five years later, it was worth $13,000. Find the average change in value each year.

$6,100 decrease each year on average

-8 ÷ y evaluate if x = -3, y = 8, z = -4

-1

|-34| - |44|

-10

3 - 14

-11

3z evaluate if x = -3, y = 8, z = -4

-12

-48/24

-2

y/z evaluate if x = -3, y = 8, z = -4

-2

7(-3)

-21

Luisa is 43 feet underground touring a cavern. She climbs a ladder up 14 feet. What is her new location?

-29 feet

-37 - 8

-45

Write an integer that represents 8°C below 0

-8

x + y + z evaluate if x = -3, y = 8, z = -4

1

xz evaluate if x = -3, y = 8, z = -4

12

Evaluate: 10 x (8 + 40) / 4 + 35 / 5

127

y - (-5) evaluate if x = -3, y = 8, z = -4

13

The highest point in California is nount Whitney at 14,494 feet above sea level. The lowest point in California is in Death Valley at 282 feet below sea level. What is the difference in elevation?

14,776 feet

A turtle dives towards deeper water at a rate of 8 inches per second. It continues for a total of 16 seconds. Write and expression for this situation and evaluate.

16(-8) = -128

Evaluate: 48 / (6 + 2) 5

30

Round 32,678.3452 to the nearest hundreth

32,678.35

Round 32,678.3452 to the nearest thousand

33,000

|-34|

34

7y evaluate if x = -3, y = 8, z = -4

56

12 + (-5)

7

x + 11 evaluate if x = -3, y = 8, z = -4

8

-8(-10)

80

Positive integer

An integer greater than 0

Negative number

An integer less than 0

Integer

Any number from the set {..., -2, -1, 0, 1, 2, ...}

Absolute Value

The distance a number is from zero on a number line

Opposite

Two integers are opposites if they are each the same distance away from zero, but on opposite sides of the number line.

Additive Inverse

a + (-a) = 0