Marina is solving the equation below by using the multiplicative inverse, or the reciprocal.
One-fifth (x minus 2) = 20
By which number should Marina multiply both sides of the equation as the first step in solving it?
One-fifth
Four-fifths
5
20
Answer: 440 grams for 1.54 is the better value
Explanation:
Take the price and divide by the number of grams
1.54 / 440 =0.0035 per gram
1.26 / 340 =0.003705882 per gram
0.0035 per gram < 0.003705882 per gram