Are 1+(8r +9) and (2+8) +8r equivalent

An assembly consists of two mechanical components. suppose that the probabilities that the first and second components meet specifications are 0.87 and 0.84. assume that the components are independent. determine the probability mass function of the number of components in the assembly that meet specifications. x

There are 4 cups in a quart and 4 quarts in a ganon.jug of water? . how many cups are in a 5-gallon jug of water?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?