Metodo de sustitucion e igualacion

3x+2y=12

4x-2y=2

The perimeter of a rectangular painting is 264 centimeters. If the width of the painting is 55 centimeters, what is it's len?

Add 5.43 to the difference of 10.15and 7.93

There are 1100 apples at a fruit stall. there are 220 more apples than mangoes. how many mangoes are there?

The surface area of a cone with a radius of 7 and a height of 17

Which is greater and by how much? A positive number a, or the same number increased by 50% and decreased by 50% of the result?

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.