Visual Algebra

Công cụ trợ giúp để giải các bài toán tuyến tính, bậc hai, bậc ba .... bằng đồ thị

Help tool to solve problems graphically

linear, quadratic, cubic and more....

Examples already done in the app:

TRAINS CROSSING: A train leaves Washington at 5 p.m. and arrives in New York at 9 p.m. Fast train leaves New York at 6 p. m. and arrives in Washington at 9 p. m. What time do they cross? At what place of the travel?

TRAINS CHASING: A train leaves New York at 5 p.m. and arrives in Washington at 10 p.m. Fast train leaves New York at 6 p.m. and arrives in Washington at 9 p.m. m. What time does it reach the first one? Where on the trip?

WATER TANK: The main faucet fills the pool in 5 hours, a second auxiliary faucet fills it in 8 hours and the drain empties it in 10 hours. If we leave the faucets and the drain open, in how many hours will the pool fill up?

PAINTERS: A painter would paint the walls of a house in 8 hours. A second painter would paint them in 12 hours. How many hours would it take the two painters to paint the house?

CLOCK HANDS OVERLAPPING: The hands of a clock overlap many times every 12 hours. At what point do they overlap for the first time after 12 o'clock? And the following?

AGES: The ages of two people add 18. The multiplication of the numbers that correspond to their ages is 56. What are their ages?

GARDEN: A small garden measures 7m. by 11m. We add around a perimeter path of fixed width. The garden with the path has grown 63m² How wide is the new perimeter path?

SQUARE GROWING: If the side of a square grows 4cm. and still is a square, then the area grows 64cm². Which was the original side size of the square?

NUMBERS: A number multiplied by the next number is 56. What are the numbers?

BOX: We want to build a 3 cm high square box containing 48 cm³. How long will the side of the base be?

CUBOID: We have a cube, and we make it grow 1m. in the first dimension, 2m. in the second dimension and 3m. in the third dimension. The original volume has increased by 52m³. What was the side of the original cube?

DIRECT RULE OF 3: We need 3 cans of paint to paint 2 rooms. How many cans of paint will we need to paint 6 rooms?

INVERSE RULE OF 3: 2 big printers print and bind 1600 books in 8 hours. How many big printers would we need to print and bind 2400 books in 6 hours?

TRAPEZOID: The parallel faces of a trapezoid measure 3 and 9 and the distance between parallel faces is 7. Split the surface of the trapezoid in two of equal surface with a parallel line to both already parallel. How far is the dividing line from the shorter parallel face?