A week has 7 days. That is, number of total days, n = 7
Number of Mondays in a week = 1
Number of Tuesdays in a week = 1
Number of Fridays in a week = 1
This is a case of selecting without replacement in that order.
P(Monday) = 1/7
P(Tuesday) = 1/(n-1) =1/(7-1) = 1/6
P(Friday) = 1/(n-2) = 1/(7-2) = 1/5
P(Monday, Tuesday, and Friday) = (1/7)*(1/6)*(1/5) = 1/210
Answer:
A.............
Step-by-step explanation:
I think it helps you
Answer:
one unique solution x=1 y=4
Start off by distributing the numbers into the parentheses:
5(-3x - 2) - (x - 3) = -4(4x + 5) + 13
-15x - 10 - (x - 3) = -16x - 20 + 13
(Note: It's super important to be careful when opening up negative parentheses! -(x-3) is not just - x - 3, it is actually -x + 3 since the negative is distributed in every number!)
-15x - 10 - x + 3 = -16x - 20 + 13
-16x - 7 = -16x - 7
-16x = -16x
0 = 0
There is an infinite number of solutions in this equation.
(When you get 0=0 when solving for a variable, that means that said variable will have infinite solutions, that is, any number plugged into the equation will work)
