Tax, Tip, and Discount
A computer cost $650. The tax rate is 6%. How much is the tax?
$39
x+10=-3
x=13
5x-23+2x=5
x=4
Find the mean:
22,18,25,14,15,18,21,19
mean= 19
What is P(5 or 6) when rolling a six sided number cube?
2/6= 1/3= 33 1/3% =
0.33333..
Tommy bought a new shirt for $13. The tax rate is 8% What is the total cost for the shirt?
$14.04
x/6=12
x=72
6x+4.06=10
x=0.99
Find the mean:
0,1,1,1,2,2,3,4,4
mean= 2
A coin is flipped 50 times. It landed on heads 27 times. What is the experimental probability of tails?
P(tails) = 23/50= 46% =
0.46
Sam is buying a desk that regularly costs $268.99. they are on sale for 15% off. What is the cost he will pay for the desk after the discount?
$228.64
2/3x=21
x=36.5
3(2x-6)=18
x=6
Find the mean:
4,14,27,12,2,6,8,22,21
mean= 12.8888..
A bag is contains 7 marbles. Three are blue and four are orange. A marble is drawn and not replaced. Then, a second marble is drawn. What is the probability of drawing first a blue and then an orange marble?
P(blue) = 3/7
P(orange given blue) = 4/6 = 2/3
P(orange and blue) = 3/7 x 2/3 = 6/21 = 2/7
Jordan buys a soda for $1.00, chips for $0.75, and a hot dog for $1.75. The tax is 7.5%. How much does he have to pay including tax?
$3.75
1=3x+10
-3=x
-4(9x-1)=-10-4
x=1 1/2
Find the mean and M.A.D:
13,2,15,8,27,28,14,4
mean= 13.875
M.A.D= 7.125
Two dice are rolled.What is the probability of rolling numbers with a sum of 7?
P( sum of 7) = 6/36 = 1/6
A computer costs $ 730 and is on sale for 30% off. After the discount is applied, there is a sales tax for 7%. What is the total cost of the computer?
$546.77
x/2-9=-5
x=8
6x+4(x-5)=26
x=4.6
Find the mean and M.A.D:
12,15,7,9,3,28,16,7,25,24
mean= 14.6
M.A.D= 7
A number cube, numbered 1-6, will be rolled by Xavier 36 times. He says he will roll each number on the cube exactly 6 times during the experiment. What could you tell Xavier about his prediction?
The experimental probability will never match exactly to the theoretical probability.