Lesson 5 Quiz 1

If a negative number is multiplied by a positive number, or a positive number is multiplied by a negative number, the product will be positive.

False

If a number is added to one side of an equation when isolating the variable, the same number must be subtracted from the other side of the equation.

False

When dividing signed numbers, if the numbers in the divisor and the dividend have the same sign, either positive or negative, the resulting quotient will be negative.

False

The rule for adding fractions with the same denominator is to add the numerators and place the sum over the same denominator.

True

To multiply fractions, first multiply the numerators to find the numerator of the product. Then multiply the denominators to find the denominator of the product.

True

A washer, nut, and locknut have a thickness of 1/2, 3/8, and 5/16 inches each. What is their total thickness? a. 1 3/16 b. 1 5/16 c. 17/8 d. 2 1/8

a. 1 3/16

Using the cross multiplication method, solve for P in: 5/P = 9/54 a. P = 30 b. P = 45 c. P = 97 1/2 d. P = 270

a. P = 30

A ratio is a comparison of two quantities by ? . a. division b. multiplication c. percentage d. proportions

a. division

A proportion is an equation that states that two ratios are ? . a. equal b. inverted c. opposite d. simplified

a. equal

Add. (-51) + (34) = ? a. -85 b. -17 c. 17 d. 85

b. -17

Solve. (-12) x (16) = ? a. -336 b. -192 c. 4 d. 192

b. -192

Add the fractions. Simplify if possible. 1/3 + 1/4 + 1/8 = ? a. 9/16 b. 17/24 c. 7/8 d. 34/12

b. 17/24

Add the fractions and express the answer in lowest terms.1/3 + 1/4 + 1/5 + 1/6 = ? a. 57/60 b. 19/20 c. 1 1/20 d. 1 9/20

b. 19/20

A formula states that A1/A2 = B1/B2 Find A2 when: A1 = 800, B1 = 640, B2 = 400 a. 320 b. 500 c. 696 d. 1280

b. 500

When writing ? fractions, the numerator and denominator must be multiplied by the same number so that the value of the fraction is not changed. a. abstract b. equivalent c. improper d. proper

b. equivalent

Solve. (-392) ÷ (-7) = ? a. -339 b. -56 c. 56 d. 65

c. 56

To solve an equation, find the value(s) of the variable that make the equation true. This is done by ? the variable. a. dividing b. identifying c. isolating d. multiplying

c. isolating

The least common multiple of a set of denominators is called the ? . a. equivalent fraction b. improper fraction c. least common denominator d. numerator

c. least common denominator

To solve multi-operational equations, more than one operation must be applied in order to isolate the ? . a. denominator b. numerator c. variable d. whole number

c. variable

Find the value of Q in the equation: Q/7 = 9 a. 16 b. 36 c. 49 d. 63

d. 63

A jet travels 2,000 miles in five hours. At the same rate of speed, how long would it take the plane to travel 3,200 miles? (Solve by ratio.) a. 3.2 hours b. 4 hours c. 7.5 hours d. 8 hours

d. 8hrs

Three shims were placed under one side of a transformer to level it. They were 1/16, 3/16, and 5/16 inches thick, respectively. What was their total thickness in inches? a. 9/48 b. 7/16 c. 1/2 d. 9/16

d. 9/16

To add a positive and negative number together, simply subtract the lesser absolute value from the greater, and precede the answer with the sign of the larger absolute value.

true