What combination of transformations is shown below?

George is 187 cm tall. his son, ralph, is 142 cm tall. who casts the longer shadow. george when the sun is 65° above the horizon, or ralph when the sun is 56° above the horizon? how much longer? (nearest centimeter)

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

Two times a number plus three times another number equals 4. three times the first number plus four times the other number is 7. find the numbers