Answer:
10
Step-by-step explanation:
Let c = sum of ages of all children.
mean age of all children = c/15 = 7
c = 15 * 7 = 105
The sum of the ages of all children is 105.
Let b = sum of ages of the 9 boys.
mean age of boys = b/9 = 5
b = 9 * 5 = 45
The sum of the ages of the boys is 45.
The sum of the ages of the girls is c - b.
c - b = 105 - 45 = 60
The number of girls is 15 - 9 = 6
mean age of girls = (sum of ages of the girls)/(number of girls) =
= 60/6 = 10
3 x 15 = 45
3 x 14 = 42
--------------
There are 14 packages.
----------------
x = 42/3
-----> 3x=42
Answer: 6 blocks
Step-by-step explanation:
Given
Volume of the rectangular prism is 
Length of the cubic block is 
Volume of each cubic block is
Suppose, n blocks are required to measure the volume of Prism
Thus, 6 blocks are required to measure the volume of prism.
Since z is the midpoint, rz and zt must be equal
4x - 15 = 25
4x = 40
X = 10
Plug the answer in and rz equals 40-15 which is 25.
25 + 25 = 50
Or if you really wanted, since you know 25 is half, just add them together right off the bat. (25 and 25, I mean)
Answer:
To calculate a break-even point based on units: Divide fixed costs by the revenue per unit minus the variable cost per unit. ...
When determining a break-even point based on sales dollars: Divide the fixed costs by the contribution margin.
