4x = 3x + 7 4 (7) = 28
-3x -3x 3 (7) + 7 = 28
1x = 7
÷1 ÷1
X = 7
Hope this helped
Answer: 1,3,4
Step-by-step explanation:
Answer:
(a)
![k=14.5](https://tex.z-dn.net/?f=k%3D14.5)
(b)
![C=14.5x](https://tex.z-dn.net/?f=C%3D14.5x)
(c)
the cost of 8 people is $116
(d)
Graph is attached
Step-by-step explanation:
we are given
It costs $145 for 10 people to attend a concert
(a)
Number of people =10
Total cost =145
now, we can find constant proportionality
k= ( total cost)/(number of people)
![k=\frac{145}{10}](https://tex.z-dn.net/?f=k%3D%5Cfrac%7B145%7D%7B10%7D)
![k=14.5](https://tex.z-dn.net/?f=k%3D14.5)
(b)
Let's assume
cost is C
number of people as x
so, we can set equation as
![C=kx](https://tex.z-dn.net/?f=C%3Dkx)
now, we can plug value
![C=14.5x](https://tex.z-dn.net/?f=C%3D14.5x)
(c)
we can plug x=8
![C=14.5\times 8](https://tex.z-dn.net/?f=C%3D14.5%5Ctimes%208)
C=116
So,
the cost of 8 people is $116
(d)
we can draw graph
Answer:
1/10
Step-by-step explanation: