Answer:
5 pounds of coffee
Step-by-step explanation:
Let the number of pounds of coffee bought be 'x'.
Given:
Value on gift card = $90
Value of coffee per pound = $8.09
Money left after buying coffee = $49.55
Now, using unitary method,
1 pound cost = $8.09
∴ 'x' pounds cost =
Now, Money left = Total money on gift card - Cost of coffee.
Therefore, Lashonda bought 5 pounds of coffee.
12, 24, 36, 48, 60,
15, 30, 45, 60
The 60th caller will win both.
Answer:
The probability is
Step-by-step explanation:
We can divide the amount of favourable cases by the total amount of cases.
The total amount of cases is the total amount of ways to put 8 rooks on a chessboard. Since a chessboard has 64 squares, this number is the combinatorial number of 64 with 8,
For a favourable case, you need one rook on each column, and for each column the correspondent rook should be in a diferent row than the rest of the rooks. A favourable case can be represented by a bijective function with A = {1,2,3,4,5,6,7,8}. f(i) = j represents that the rook located in the column i is located in the row j.
Thus, the total of favourable cases is equal to the total amount of bijective functions between a set of 8 elements. This amount is 8!, because we have 8 possibilities for the first column, 7 for the second one, 6 on the third one, and so on.
We can conclude that the probability for 8 rooks not being able to capture themselves is
I got you fam
2(x - 4) - 4x = 0
2x - 8 - 4x = 0
-2x - 8 = 0
-2x -8 + 8 = 0 + 8 (add 8 both sides)
(divide both sides by -2)
x = -4
Hope this helps