Page 93 - Algebra 1

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Justify What must be true of each of the values of x and y if -xy is positive? zero? negative?
Identify the property illustrated in the expression 5 · 6 = 6 · 5.
Multiple Choice A number cube labeled 1–6 is tossed. What is the theoretical
probability of rolling an odd number?
A _1 2
B _1 3
C _1 4
D _2 3
A letter is chosen at random from the word probability. What is the probability of randomly choosing the letter b?
Multiple Choice A bag contains 4 blue, 6 red, 5 yellow, and 1 orange marble. What is
the probability of randomly choosing a blue marble?
A _1 16
B _4 15
C _1 4
D _4 32
Error Analysis Students were asked to find the square root of 16. Which student is correct? Explain the error.
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BrakingDistance Thespeedavehiclewastravelingwhenthebrakeswerefirstapplied d
Student A
√ 16 = 4 4 × 4 = 16
Student B
√ 16 = 8 8 × 2 = 16
_
can be estimated using the formula s = √ , where d is the length of the vehicle’s
0.04
skid marks in feet and s is the speed of the vehicle in miles per hour. Determine the
speed of a car whose skid marks were 42 feet long.
Physics The centripetal force of an object in circular motion can be expressed as mv ,
_2
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Saxon Algebra 1
r where m is mass, v is tangential velocity, and r is the radius of the circular path.
What is the centripetal force of a 2-kg object traveling at 50 cm/s in a circular path with a radius of 25 centimeters?