Grade 6 Unit 12

A candle weighs 300 grams (g). Each hour the candle is lit, it burns 4 g of its wax. Let h be the number of hours the candle burns. Write an expression that represents the weight of the candle.

• 300 - 4h

• 300 + 4h

• 300h - 4

• 4h - 300

Solve the equation: -6x = 108.

• x = -18

• x = 18

• x = -16

• x = 16

Solve the equation: 147 = b - (-12).

• b = -135

• b = 159

• b = 147

• b = 135

Solve the equation: w + 28 = 17.

• w = -11

• w = 11

• w = 5

• w = -5

Solve the equation: -72 = y / -2.

• y = 144

• y = -144

• y = 72

• y = -72

The Self-Transcendence 3,100 mile race is the world's longest certified footrace. Write an equation that can be used to determine how many miles a person has to run each day, x, if they complete the race in 50 days.

• x = 3100 / 50

• x = 3100 * 50

• x = 3100 + 50

• x = 3100 - 50

• k = -24

• k = -172

• k = 24

• k = 172

• h = -225

• h = 225

• h = -250

• h = 250

Buddy is planning a trip from Tampa to Jacksonville. He finds that traveling by car will take 204 minutes. He finds that traveling by train will take 112 minutes more than traveling by car. Write an equation that can be used to determine the time it takes to travel by train, x.

• x = 204 + 112

• x = 204 - 112

• x = 204 * 112

• x = 204 / 112