A turtle walks 3 feet in 12 seconds. At this speed, how far does the turtle walk in 30 seconds

Plz.yesterday, the snow was 2 feet deep in front of archie’s house. today, the snow depth dropped to 1.6 feet because the day is so warm. what is the percent change in the depth of the snow?

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?

Gabrielle's age is two times mikhail's age. the sum of their ages is 84. what is mikhail's age?