Who can do it? what is the answer?

Solve for x -2.3(r - 1.2 ) = -9.66 enter you answer as decimal.

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

What is the total surface area of this square pyramid?