Visual Algebra

帮助工具以图形方式解决线性、二次、三次......问题

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?