21.
Write “five less than four times a number” as an algebraic expression.
Expression: ____________________________
Evaluate the expression above when the value of the unknown number is 3.
Show your work.
Answer ___________________
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f
22.
Write the prime factorization of 120 in exponential form.
Show your work.
Answer __________________
23.
Gildaʼs family goes on a vacation. They travel 125 miles in the first 2.5 hours. What is their
rate of speed in miles per hour?
Distance = rate x time
Show your work.
Answer __________________ miles per hour
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f
24.
The chart below displays the daytime high and the nighttime low temperatures for one Friday
in Anchorage, Alaska.
Friday Daytime High
Friday Nightime Low
-7°
-16°
Part A
How many degrees did the temperature drop from the daytime high to the nighttime low?
Answer _____________ degrees
Part B
The warmest recorded temperature in Anchorage is 96 degrees higher than the Friday
nighttime low temperature. What is the highest recorded temperature for Anchorage, Alaska?
Show your work.
Answer _______________ ° F
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f
25.
The temperature in St. Cloud, Minnesota, was -4°F (Fahrenheit) on January 27 and 13° F on
January 28.
Part A
On the number line below, plot the temperatures for January 27 and January 28. Be sure to
label both points with the appropriate date.
Part B
How many degrees warmer was it on January 28 than on January 27?
Show your work.
Answer _________________ ° F
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f
26.
The table below shows the number of Earth days it takes for two of Jupiterʼs moons to make
one full orbit around Jupiter.
JUPITERʼS MOONS
Name
Orbit Time
(in Earth Days)
Callisto
1.67 x 10
Themisto
1.3002 x 10
1
2
€
€
How much longer, in Earth Days, does it take for Themisto to orbit Jupiter than it does for
Callisto to orbit Jupiter? Write your answer in standard form.
Show your work.
Answer _____________________ Earth Days
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f
27.
Part A
Graph the following real numbers on the number line below.
-6.5
-
9
€
-7
-6
€
-5
-4
-3
-2
-1
18
5
37
1.75
€
0
1
2
3
4
5
6
7
Part B
Identify the irrational number from the list above: _________
Part C
Explain why the number is an irrational number:
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
___________________________________________________________
Jonathan Roberts
Friday, September 30, 2011 4:02:16 PM ET
00:1b:63:38:68:6f