Answer:
the number is 27
Step-by-step explanation:
7 - 2 = 5
72 ÷ 3 = 24
24 ÷ 8 = 3
Answer:
4 hours
Step-by-step explanation:
Let x = # of hours
22x + 10 = 98
-10 -10
____________
<u>22x = 88</u>
22
x = 4
Given:
Cost of two donuts and three cookies = $3.30
Cost of five donuts and two cookies = $4.95
To find:
The cost of each donut.
Solution:
Let x be the cost of each donut and y be the cost of each cookie.
Cost of two donuts and three cookies = $3.30
...(i)
Cost of five donuts and two cookies = $4.95
...(ii)
Multiply equation (i) by 2.
...(iii)
Multiply equation (ii) by 3.
...(iv)
Subtracting (iii) from (iv), we get
Divide both sides by 11.
Therefore, the cost of each donut is $0.75.
Answer:
true
Step-by-step explanation:
The formula is a permutation in which n represents the sample points in the set, while r represents the number of sample points in each permutation.