Question 1157670
in 1 minute Andy does (1/45) and Anita does (1/30)
in x minutes, they do (x/45)+(x/30) together. This equals 1.
multiply by common denominator of 90
2x+3x=90
5x=90
x=18 min needed ANSWER.
Andy does 18/45 or 0.4 and Anita does 18/30 or 0.6