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What does this inequality sign mean? That A "is greater than" B.

We can treat inequalities as if they are = signs as long as we don't multiply or divide by negative numbers. What would ha...

To calculate the length of the unknown side you must know the lenght of two of the other sides of the right angled triangle. if we know this we can use pythagoros thereom. The equation for this is a^2+b^2...

3x + 2y = 4 (equation 1) 4x + 5y = 17 (equation 2) Multiply equation 1 by 2.5, giving 7.5x + 5y = 10 (equation 1) 4x + 5y = 17 (equation 2) Subtract equation 2 from equation 1, giving 3.5x = -7 Therefore,...

(x+1)(x-1)

Of course - let's solve this question:

Question: Solve the following quadratic simultaneous equations

(1) 2x + y = 4 - x

(2) y² + 4x = 12

An...