Forty percent of the students in a fourth grade class are 9 years old. another 0.25 are 10 years old, and the rest of the class is 11 years old. write the number of students that are 11 years old as a fraction, decimal, and percent.

The sum of the first eight terms of an arithmetic progression is 9m + 14. the fifth term of the06 progression is 2m - 6, where m is a constant. given that the first term of the progression is 26,find the value of the common difference, d and thevalue of m.

Provide all steps given to find the answer. simplify: 5(2x+9)²

How much higher is checkpoint 4 than checkpoint 2 if checkpoint 4 is -143 and checkpoint 2 is -182