Answer:
Step-by-step explanation:
This could help
https://www.jcschools.us/cms/lib03/MO01909951/Centricity/Domain/2287/2-1%207th%20grade%20math.pdf
ratio for the first mix is 3:2 the ratio for the second mix is 4.5:3
Yes, since 3 times 1.5 is 4 and 2 times 1.5 is 3
Rachel spends 6 hours 45 minutes a week trying to learn to play the violin.
Step-by-step explanation:
Step 1; Rachel learns for 45 minutes a day from Monday through Friday and in the weekend she learns to play the violin for one and a half hours. So she learns for the following periods of time
Monday - 45 minutes
Tuesday - 45 minutes
Wednesday - 45 minutes
Thursday - 45 minutes
Friday - 45 minutes
Saturday - 90 minutes (60 × 1.5 hours)
Sunday - 90 minutes (60 × 1.5 hours)
Step 2; To determine how much time she practices in a week we just add the individual times she plays on each day.
Total time practices in a week = 45 + 45 + 45 + 45 + 45 + 90 + 90 = 405 minutes = 6 hours 45 minutes.
