An airplane travels eight times as fast as a car. the difference in their speeds is 420 km/h. how fast is each vehicle travelling?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Which of the following would be a reasonable estimate for the weight of a pencil? a. 1 × 10^-20 lb b. 1 × 10^20 lb c. 1 × 10^2 lb d. 1 × 10^-2 lb

Hundred and tens tables to make 430 in five different ways