Answer:
13,88,22
On the first evening Jamie received 13 calls.
Step-by-step explanation:
Total number of phone calls received by Jamie over three evenings = 123
Let the number of phone calls received on the third evening = x.
The number of phone calls received on the second evening = 4*x.
The number of phone calls received on the first evening = 
Expressing in equation form:
![\[x+4x+x-9=123\]](https://tex.z-dn.net/?f=%5C%5Bx%2B4x%2Bx-9%3D123%5C%5D)
![\[=>6x-9=123\]](https://tex.z-dn.net/?f=%5C%5B%3D%3E6x-9%3D123%5C%5D)
![\[=>6x=132\]](https://tex.z-dn.net/?f=%5C%5B%3D%3E6x%3D132%5C%5D)
![\[=>x=\frac{132}{6}\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%3D%5Cfrac%7B132%7D%7B6%7D%5C%5D)
![\[=>x=22\]](https://tex.z-dn.net/?f=%5C%5B%3D%3Ex%3D22%5C%5D)
So Jamie received 22 calls on the third evening, 88 calls on the second evening and 13 calls on the third evening.
5 and up, raise it up
4 and below, keep it low!
7.0
Answer:
4*0.40+5*0.75=5.35
Step-by-step explanation:
Answer:

Step-by-step explanation:
Given
Shape: Cube
Dimension: (x+7y), (7x-y) and (xy-5).
Required
Determine the volume
The volume is calculated by multiplying the dimensions:

Evaluate the first 2 brackets
![Volume = [x(7x-y)+7y(7x-y)] * (xy-5)](https://tex.z-dn.net/?f=Volume%20%3D%20%5Bx%287x-y%29%2B7y%287x-y%29%5D%20%2A%20%28xy-5%29)
![Volume = [(7x^2-xy)+(49xy-7y^2)] * (xy-5)](https://tex.z-dn.net/?f=Volume%20%3D%20%5B%287x%5E2-xy%29%2B%2849xy-7y%5E2%29%5D%20%2A%20%28xy-5%29)
![Volume = [7x^2-xy+49xy-7y^2] * (xy-5)](https://tex.z-dn.net/?f=Volume%20%3D%20%5B7x%5E2-xy%2B49xy-7y%5E2%5D%20%2A%20%28xy-5%29)
![Volume = [7x^2+48xy-7y^2] * (xy-5)](https://tex.z-dn.net/?f=Volume%20%3D%20%5B7x%5E2%2B48xy-7y%5E2%5D%20%2A%20%28xy-5%29)
Open brackets
![Volume = xy[7x^2+48xy-7y^2] -5[7x^2+48xy-7y^2]](https://tex.z-dn.net/?f=Volume%20%3D%20xy%5B7x%5E2%2B48xy-7y%5E2%5D%20-5%5B7x%5E2%2B48xy-7y%5E2%5D)
