Matematyka wokol nas klasa 4 zadanie 7 strona 219

2x + 5y = 12 -2x + 3y = 4 In elimination method

How many 1-ft square tiles would it take to cover the room of a square room that is 27 ft on each side?

Select the difference of (8x^2-3x^3) - (2x^2-6x^3)

40 kids went to a baseball game. They each got either popcorn or a hot dog. Hot dog is $2.25 and popcorn is $1.75. How many hot dogs and popcorn did they get?

Dee's cost for last semester was $2700. If she spent $378 on books, what percent is this?

What number equals 100 when squared?

What are the zeros of f (x) = x^2-8x+15

What is the average speed on a car that travels 800 kilometers in 20 hours?

Solve the following equation. Then place the correct number in the box. 3x + 1 + 5x = 7 + 15 = 7x X =

Party favors are on sale for $2.40 each. You have $380 to spend on the decorations and gifts, and you have already spent $270 on decorating. Write and solve an inequality to find the number of party favors you can buy.