3 * 4 = 12
12 * 4 = 48
48 * 4 = 192
192 * 4 = 768
The next number in the sequence is the previous number multiplied by 4:
The next number would be 768 x 4 = 3072
77(7) = 539, the total points of all her tests
539 - 18 + 81 = correct total points = 602
602/7 = 86 which is the new average
Answer: third one
Step-by-step explanation:
There are 80 children. 45 of them are girls. The amount of boys is equal to:

That means there are 45 girls and 35 boys.
The ratio of boys to girls is: 
Simplify:

Your answer is 7:9
Answer:13 miles
Step-by-step explanation:10.20-1.75=8.45÷0.65=13