Probability Powers
A die is rolled. Probability of rolling a 6?
1/6
Solve: 3x = 21
x = 7
Are 2/3 and 4/6 equivalent?
Yes
7-12
-5
Circumference formula?
C = πd or 2πr
Probability of an impossible event
0
Solve: 2x + 3 = 15
x = 6
5 notebooks cost $15. How much for 8 notebooks?
$24
-7 + (-8)
-15
Circumference of circle radius 5
31.4 Units
Probability of NOT rolling a 1 on a die?
5/6
Solve: 7 + 2x = 25
x = 9
Find y when y = 7x and x = 5
35
Put these in order:
-3,2,-8,0
-8,-3,0,2
Surface area of cube side 4
96
A bag has 6 black and 4 white marbles. One is removed and NOT replaced. Probability the second marble is white after first was black?
4/9
A phone plan charges $25 plus $4 per gigabyte. Write an equation.
y = 4x + 25
A recipe uses 2 cups flour for 5 cookies. How much flour for 20 cookies?
8 Cups
Temperature drops from 8° to −6°. Change?
-14 °
Find angle formed by supplementary angles if one is 125°.
55°
A die is rolled 60 times and lands on 4 twenty times. Experimental probability? Compare to theoretical (Expected Probablility).
Experimental = 1/3
Theoretical = 1/6
A gym charges $15 membership plus $8 per visit. Another charges $40 membership plus $3 per visit. When do costs match?
At 5 visits
A map scale is 1 inch = 12 miles. Two cities are 4.5 inches apart. Actual distance?
54 Miles
Compare −3² and (−3)²
-9 and 9
Explain why vertical angles are congruent.
Opposite angles formed by intersecting lines are equal.