Hello, can someone help with these problems. Simplify:
3x+9-4x
2(3-4x)+5
(3x+5)- 2(8x+3)
(2x+3y-4) - (3x+5y+6)
3(2x-4y+8) -5x -4
Thx!!

Let the mean of the population be 38 instances of from 6" - 9" hatchings per nest, and let the standard deviation of the mean be 3. what sample mean would have a confidence level of 95% or a 2.5% margin of error?

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

The verbal translation for the difference of m and 7 increased by 15