Pe multimea numerelor reale se defineste legea de compozitir asociativa data de x * y = x + y - 2

a) calculati 5 * (-5)

b) aratati ca legea de compozitir * este comutativa

c) calculati (-3) * (-2) * (-1) * 0*1*2*3

What is the solution of 4x = 32 - x2?

The owner of a 4000-gal oil truck loads the truck with gasoline and keroseno. The profit on each gallon of gasoline is 16e and on each gallon of kerosene it is 12¢.

Brett made a scale drawing of a rectangular rom in his house. the actual length of the room is 12 4 5 ft. the scale he used to make the drawing was 1 4 inch = 1 foot. what is the length, in inches, of the room on the drawing?

ben has agreed to play fewer video games and spend more time studying. he has agreed to play less than 10 hours of video games each week. on monday through thursday, he plays video games for a total of 5 1/2 hours.

Find the length of the hypotenuse on a right triangle if the other sides have lengths of 5 cm and 12 cm. cm 13 cm 17 cm 169 cm

A cell phone provider charges $30 each month to have a cell on their plan, but their talk and text are not free. It costs $0.05 for every minute of talk and $0.10 for every text sent. There is no charge for receiving texts. a.

Write the equation of the graph of y=3sinx translated 2 units up and right pi units

Ryan rides his bicycle 5 miles in 34 hour. How many miles can he ride at the same rate in 1 hour? I need the answer as a fraction.

Which of the following transformations will always produce a congruent figure? * A contraction B reflection C expansion D dilation

Which is the graph of 3x - 2y = 6?