What do you do when you don't know what X is

Thomas, the drum major, can run across the football field in 1/3 the time that Carl, the tuba player, can. if the sum of the two boys' times is 4.8 minutes, how many minutes does it take Carl to cross the football field?

Two cyclists leave towns 81 miles apart at the same time and travel toward each other. One cyclist travels 9 mih slower than the other. If they meet in 3 hours, what is the rate of each cyclist?

Scientists studied a deer population for 10 years. They generated the function f (x) = 248 (1.15) x to approximate the number of deer in the population x years after beginning the study.

What is the position of 7 in the number 876,543? A. The ten-thousands place B. The thousands place C. The tens place D. The hundreds place

The relative growth rate for a certain type of fungi is 70% per hour. a small culture has formed and in just 6 hours the count shows to be 54,273 fungi in the culture. what is the initial number of fungi in the culture?

Factor each expression and explain how. 52. w^2 - 15w - 54 54. -2h^2 + 4h + 70

What is the solution to 2.1m = 6.3? A. m = 8.4 B. m = 3 C. m = 3.2 D. m = 4.2

Select the two figures that are similar to the 9 by 6 figure that is shown.

What is the quadratic function that is created with roots at 2 and 4 and a vertex at (3, 1) ?

Four candidates are running for president of the student council. Three other candidates are running for vice-president. How many different ways can the two offices be filled? a. 6 different ways c. 12 different ways b. 10 different way d.