If 3x + 5y = 42 and 9x + 7y = 78, then x + y = ?

If the directrix of a parabola is the horizontal line y = 3, what is true of the parabola? answer is B

The difference of two numbers is 34 and their sum is 338

Among 21 - to 25-year-olds, 29% say they have driven while under the influence of alcohol. Suppose that three 21 - to 25-year-olds are selected at random. a) What is the probability that all three have driven while under the influence of alcohol

On a math test, Jessica answered 20% questions incorrectly. She answered 16 questions correctly. How many total questions did she answer?

The y-intercept of the line whose equation is 7x - 4y=8 is

The solution set for all real numbers x such that 2x + 3 < 19 and 2x - 3 ≤ - 7 is

The probability that a restuarant patron is wearing blue shoes is 0.36. the probabilty that a restaurant patron is 27 years old is 0.017. what is the probability that a patron has blue shoes and is 27?

There are 790 cal in 610 ounce bottles of apple juice how many calories are there in one 10 ounce bottle of apple juice

At a summer camp there are 10 teenagers sleeping in each tent. assume that these 10 teenagers are independent of each other. what is the probability that at least one of them suffers from arachnophobia?

32x-4=12 (3x-8) Which statement best describes the solution set of the equation? Answer Choices The equation has no solutions because there is no value of x that makes the equation true.