Math for Kids

Recent Answers

2010-02-08 Geometry - Area of Triangle Using Semiperimetre:

Hi Jillian! The subject line doens't match the question, and that has me confused. I'm nearly certain this problem depends on the shape of the triangle. There is a formula for finding the area of

2010-02-07 Word Problems - Ratios:

When the ratio is not 1:1, whcih corresponds to the fraction 1/1, that is when the numbers are equal. For the numbers, 4/2 is not 8/6, and neither of them is 10/15. This is because: For 4/2

2010-02-07 Algebra - Algebra:

1. There are 2/3 as many workers, so it will take them 3/2 as long. 2. Well, 10 liters of 30% solution is 3 liters alcohol out of 10 liters. The stuff we are adding is 60% alcohol. That works out

2010-02-07 Word Problems - Matrix Equation:

For interest, it is given that (A) 10x + 9y + 6z = 8(144,000). It is also given that (B) x + y + z = 18,000. Then lastly, it is given that 2x = y + z, which means (C) x = (y+z)/2. Putting (C) into

2010-02-06 Algebra - common binomial factors:

Hello Lizzy, I don't think the step where you went from: (5y-z) [xsquared - 1 (12x-20)] to: (5y-z) [(x-1) (x+1) (12x-20)] is correct. First of all, let's use"x^2" instead of "xsquared"