Question

Bob burns 5 calories per minute swimming and 11 calories walking and swims for x minutes. In the afternoon, Bob will jog for a x minutes. How many minutes must he jog to burn at least as many calories y in the afternoon as he did in the morning?

-what Im having trouble with is finding the two equations that Im supost to work with other than that I can do this on my own.

Answer 1

I messed up the question its: Bob burns 5 calories per minutes swimming and 11 calories per minute jogging. In the morning, Bob burns 200 calories walking and swims for 'x' minutes. In the afternoon, Bob will jog for "x" minutes. How many minutes must he jog to burn at least as many calories 'y' in the afternoon as he did in the morning?

Answer 2

use the number of calories per minute and the number of minutes in each activity to set up the 2 equations.

So, "x" is the number of minutes swimming in the morning... and he burns x * 5 calories while swimming. He also burns 200 calories walking.

So in the morning, Bob burns 5x + 200 calories... maybe you want to set that equal to "M" for Morning. M = 5x + 200.

In the afternoon, Bob will burn calories ONLY by jogging... he burns 11 calories per minute and jogs "x" minutes... so y = 11x.

You want to know how many minutes "x" he has to jog for y = 11x to be equal to the morning calories which were M = 5x + 200.

In other words, for what "x" will...
MORNING calories = AFTERNOON calories
(5x + 200) = 11x

Answer 3

oh my gosh thank you :D

Answer 4

it's a little tricky at first to see how to set up those equations, but just keep working through the words in the problem and try to write expressions to match. You may not get it all immediately, but if you don't find enough to solve, go back again and look for info you missed :)

You'll get better with practice... you get better spotting the key words and how to translate English into Equations :)

Answer 5

glad to help :)