You can simplify and evaluate expressions, factor/multiply polynomials, combine expressions.
You can solve all problems from the basic math section plus solving simple equations, inequalities and coordinate plane problems.
Let's suppose that each of the four tractors ploughed $x$ hectares a day.
Therefore in 5 days they ploughed $5 \cdot 4 \cdot x = 20 \cdot x$ hectares, which equals the area of the whole field, 2880 hectares. Hence, each of the four tractors would plough 144 hectares a day.
Then the second cow produced $(8100 - x)$ litres of milk that year.
The second year, each cow produced the same amount of milk as they did the first year plus the increase of \%$ or \%$.You can also evaluate expressions, factor polynomials, combine/multiply/divide expressions.You can step by step solve your algebra problems online - equations, inequalities, radicals, plot graphs, solve polynomial problems.Problem 1 A salesman sold twice as much pears in the afternoon than in the morning. Then Mary and Lucy picked x$ and $x 2$, respectively.If he sold 360 kilograms of pears that day, how many kilograms did he sell in the morning and how many in the afternoon? This must be equal to 360.x = 360$$x = \frac$$x = 120$ Therefore, the salesman sold 120 kg in the morning and \cdot 120 = 240$ kg in the afternoon. Together the three of them picked 26 kg of chestnuts. So $x 2x x 2=26$x=24$$x=6$ Therefore, Peter, Mary, and Lucy picked 6, 12, and 8 kg, respectively.Solution: Let $x$ be the number of kilograms he sold in the morning. Problem 2 Mary, Peter, and Lucy were picking chestnuts. Solution: Let $x$ be the total number of pages in the book, then she finished $\frac\cdot x$ pages.Then she has $x-\frac\cdot x=\frac\cdot x$ pages left.They met at station C at 12 pm, and by that time the express train stopped at at intermediate station for 10 min and the freight train stopped for 5 min. Then the distance from station C to station A is $(148 - x)$ km.By the time of the meeting at station C, the express train travelled for $\frac \frac$ hours and the freight train travelled for $\frac \frac$ hours.Problem 9The first year, two cows produced 8100 litres of milk.The second year their production increased by 15% and 10% respectively, and the total amount of milk increased to 9100 litres a year.