How can we solve question 13 algebraically? Will give brainliest + 10 points

The answer is C.

Step-by-step explanation:

First, you have to make expressions for all the flags :

Green flag cost 10 times the price of blue flag,

Red flag is half the price of green flag,

Orange is 10 dollars less than red flag,

Assuming that the total cost of all 4 different coloured flags is $200. So you have to solve the value of x :

Then, you have to substitute the value of x into the expression of orange flag :

The work done is 4386.6 J.

Step-by-step explanation:

The work is given by:

Where:

F: is the applied force = 42 pounds

d: is the displacement = 85 feet  

Since the force is applied at an angle (θ) of 25° with the horizontal we have:

Therefore, the work done is 4386.6 J.

I hope it helps you!