The cost, c(x), for a taxi ride is given by c(x) = 2x + 3.00, where x is the number of minutes. what does the slope mean for this situation? a.the rate of change of the cost of the taxi ride is $3.00 per minute. b.the rate of change of the cost of the taxi ride is $2.00 per minute. c.the taxi ride costs a total of $3.00. d.the taxi ride costs $2.00 per trip.

The correct answer is b) The rate of change of the cost of the taxi ride is $2.00 per minute.

This is proven with simple mathematics of how to calculate the fare of a taxi ride. 
Interestingly these simple equations are also used to measure the fare in a black taxi cab of London and even those for your Uber car.

The correct answer is: 11

Here’s how you solve it!

You can remove the 0 since when you add or subtract 0 it stays the same.

Then you would want to look at the first set of parentheses (-20)

Since it is -(-20) this changes the sign to a positive +20

9-5+20+(-13)

Now since the + is in front of the (-13) it remains the same.

Now you are left with this:

9-5+20-13

9-5=4

4+20=24

24-13=11

Then you are left with your 11

Hope this helps! :3