Please i need assistance on these.

10. The S-Cargo shipping company calculates shipping charges using the linear model, y = 2.72x, where y is the cost in dollars and x is the weight of the package in pounds (1 x 9). Use the linear model to compute the weight of a package with a shipping cost of $21.76. Round to the nearest hundredth of a pound, if necessary.

11. Two cars are 270 miles apart and travel toward each other on the same road. They meet in 3 hours. One car travels 2 mph faster than the other. What's the average speed of each car?

12. A line contains the point (4, 5) and is perpendicular to a line with a slope of -2/3. Write an equation of the line satisfying the given conditions. Write the answer in slope-intercept form.

13. Solve the equation: 6 - 3(-2 - 4x) = 2(3(x - 4) + 7)

14.A freight train and a passenger train leave a rail yard at the same time and travel on parallel tracks. The passenger train travels 6 mph faster than the freight train. The combined distance traveled after 2 hours is 100 miles. What's the average speed of each train?

15.A line contains the point (-3, -4) and is perpendicular to a line with a slope of 3/5. Write an equation of the line satisfying the given conditions. Write the answer in slope-intercept form.

16.Solve for the variable x.

F = kx - kx0