If x+y=15 and x-y=-19 then what does xy=?

На первых трёх уроках Вася получил по одной оценке: 3, 4 и 5. Дома он сказал: " Пятерку я получил не на третьем уроке. А четверку получил на втором ". Потом оказалось, что оба раза Вася сказал неправду. На каком уроке Вася получил тройку?

Find the number of ways to distribute six different toys to three different children such that each child gets at least one toy.

Mrs. Franks has 45 pounds of grain to divide among the farm animals. If each animal receives 3/4 pound of grain for each feeding, how many times can mrs. Franks feed her animals?

A company uses paper cups shaped like cones for it's water cooler. Each cup has a height of 15cm, and the base has a radius of 5cm. The cooler has 18,840cm^3 of water in it. Hke many cups can be filled from the cooler?

How to factor 3xy-6x+4x-8

Compute the average number of units consumed: 504, 519, 576, 321, 256, 101, 76, 75, 127, 289, 367, and 511.

Sales tax in particular city is 6.5% what is the final cost of a $94 item?

If the sin 90° = 1, then which statement is true? cos 0° = 1, because the angles are complements cos 90° = 1, because the angles are supplements cos 0° = 0, because the angles are complements cos 90° = 0, because the angles are supplements

What is the value of x? -1/2x - 7 = - 11

A scale has a percent error of 7% the scale reads the mass of a book as 450 g. which statement described what the actual mass of the book could be A. the actual mass of the book is between 315 g. and 585 g.