Question: In a math test, there were 20 questions of three levels: easy questions (2 points), medium questions (3 points), and hard questions (5 points). The total score of all questions was 70 points. The total score of all medium questions and the total score of all easy questions were in the ratio of 9 : 1.
Tai correctly answered all easy questions, half of the medium questions and two-third of the hard questions. How many points did he score in total? Show your work.

Step-by-step explanation:

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expression #3 is not equivalent. the others are.

the ratio of white tiles to blue tiles is 48: 16. the ratio in it's simplest form is 3: 1.

step-by-step explanation:

ratio: take the first number and add a colon next to it, then add the second number after that. make sure the ratio order matches up with the written problem!

simplest form: we can simplify the ratio 48 : 16 by dividing both terms by the greatest common factor (gcf).

the gcf of 48 and 16 is 16.

divide both terms by 16:

48 ÷ 16 = 3

16 ÷ 16 = 1

reducing to simplest form:

48 : 16 = 3 : 1