2cars get an oil change at the same service center. each customer is charged a fee x (in dollars) for the oil change plus y dollars per quart used. the first car required 5 quarts of oil, and the oil change all together costed $22.45. the second car required 7 quarts on oil, and the oil change all together costed $25.45. what service fee and cost per quart of oil?

step-by-step explanation: a reaction is first order. if the initial reactant concentration is 0.0200 m, and 25.0 days later the concentration is 6.25 x 10-4 m, then its half-life is:

answer: 414,377,008

step-by-step explanation:

just multiply it

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.