The Smith Family left the lake to head home at 8:00 am and drove at an average speed of 55 mph the whole way home. The Roberts Family left the lake at 8:30 AM and drove an average of 65 mph the whole way home. If the total trip is 260 miles, how may hours did it take the Roberts family to arrive home?

Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

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

Does the problem involve permutations or? combinations? do not solve. the matching section of an exam has 4 questions and 7 possible answers. in how many different ways can a student answer the 4 ? questions, if none of the answer choices can be? repeated?