Answer: To increase the expected value, the probability of someone winning must increase. So, if the state took out some possible numbers, the probability (and expected value) of winning would increase. To decrease the expected value, add more numbers to the lottery number possibilities.
Step-by-step explanation:
.88y +.03y = final cost or more simply .91y = final cost
100% - 12% discount leaves 88% of y (.88y)
3% tax = .03y
.88y + .03y = .91y
Answer:
In two years erin grew 7 inches
Step-by-step explanation:
42 - 35 = 7
Answer:
x = 8 , y = 3
Step-by-step explanation:
3x + 2y = 30
3x - y = 21 -> y = 3x - 21
3x + 2 (3x - 21) = 30
3x + 6x - 42 = 30
3x + 6x = 30 + 42
9x = 72
x = 72/9 = 8
y = 3*8 - 21 = 24 - 21 = 3
∴ x = 8 & y = 3
