Answer:
![17\ \text{hours and}\ 15\text{ minutes}](https://tex.z-dn.net/?f=17%5C%20%5Ctext%7Bhours%20and%7D%5C%2015%5Ctext%7B%20minutes%7D)
Step-by-step explanation:
The function is
![-4x+3y=21](https://tex.z-dn.net/?f=-4x%2B3y%3D21)
Where
x = Time in hours
y = Velocity in kilometers per hour
Here y = 30 km/hr
![-4x+3y=21\\\Rightarrow x=\dfrac{3y-21}{4}\\\Rightarrow x=\dfrac{3\times 30-21}{4}\\\Rightarrow x=\dfrac{69}{4}\\\Rightarrow x=17.25\ \text{hours}=17\ \text{hours and}\ 15\text{ minutes}](https://tex.z-dn.net/?f=-4x%2B3y%3D21%5C%5C%5CRightarrow%20x%3D%5Cdfrac%7B3y-21%7D%7B4%7D%5C%5C%5CRightarrow%20x%3D%5Cdfrac%7B3%5Ctimes%2030-21%7D%7B4%7D%5C%5C%5CRightarrow%20x%3D%5Cdfrac%7B69%7D%7B4%7D%5C%5C%5CRightarrow%20x%3D17.25%5C%20%5Ctext%7Bhours%7D%3D17%5C%20%5Ctext%7Bhours%20and%7D%5C%2015%5Ctext%7B%20minutes%7D)
The particle will reach 30 km/hr after
.
Answer:
Step-by-step explanation:
= 4x - 11
x is the input, y is the output.
So if you want to know what input is needed to get an output of 10, set y to 10 and solve for x:
10 = 4x - 11
21 = 4x
x = 21/4
We already know that C = 45. All we really need to do is simplify the equation and then solve for x.
45 = x + 0.06x + 0.08x + 0.1x
45 = (1 + 0.06 + 0.08 + 0.1)x
45 = 1.24x
x = 36.2903, which rounds to $36.29 for the haircut.
Answer:
A. B. C
They surely share a proportional relationship