Answer:
The constant of proportionality k = 11.5.
The equation will be: 
Step-by-step explanation:
If x represents number of hours than y represents miles
We are given:
x y
4 46
5 57.5
6 69
The constant of proportionality can be found using formula: 
Putting values and finding k
x y k (
)
4 46 11.5
5 57.5 11.5
6 69 11.5
So, the constant of proportionality k = 11.5
Now, The equation will be:

So, the equation will be: 
Answer:
x = - 
Step-by-step explanation:
Given
(x - 4) - (x + 7 ) = 8x
Distribute parenthesis noting second is distributed by - 1
x - 4 - x - 7 = 8x ← simplify left side
- 11 = 8x ( divide both sides by 8 )
x = - 
Answer:
76233
Step-by-step explanation:
Add the numbers together:
75444 + 789 = 76233
Answer:
cos47° = 
Step-by-step explanation:
cos47° =
= 
13y-2b=15y
2b=2y
2b=2y
2b=2y