the answer is the last one: a 90° clockwise rotation
Answer:
45 members are in the choir.
Step-by-step explanation:
Set up an equation:
Variable x = boys
3/6 = x/30
Cross multiply:
3 × 30 = 6 × x
90 = 6x
Divide both sides by 6:
15 = x
There are 15 boys.
To find the number of members in the choir, add the number of boys and girls:
30 + 15 = 45
2/3 of an hour is 40 minutez, therefore that times 4 equals to 160 minutes or 2h and 40 minutes. The answer should be 2-3
