The recursive formula for an arithmetic sequence is an = an-1 + d. if the common difference is -13 and a3 = 4, what is the value of a4?

Aclass consists of 55% boys and 45% girls. it is observed that 25% of the class are boys and scored an a on the test, and 35% of the class are girls and scored an a on the test. if a student is chosen at random and is found to be a girl, the probability that the student scored an ais

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class

Find the area of the unshaded square