Translate this phrase into an algebraic expression.
1 answer:
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First convert the first equation to combine like terms. Then set your equations up as an addition problem. You want at least one of your variables (y) to be of opposite values so the will cancel out to leave you with just one variable (x). Plug in 1/3 for the x into one of the equations to solve for y. Then write as an ordered pair.
If you solve d = rt for t, you have t = d/r. If we have values for d and r we will fill them into that equation and divide. 
. Setting that up so the meters cancel as they should looks like this: 
lets us divide as we need to and at the same time cancel out the distance, leaving us time in hours. The t value then is 11.3 hours.