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Solve the simultaneous equations 3x + y = -4 and 3x - 4y = 6

When solving simultaneous equations our goal is always to use the equations given, which each have two unknowns in them, in order to find an equation with only one unknown. In this example, we can see that b...
SE
Answered by Sofya E. • Maths tutor
21804 Views

If A is divided by B, the result is 5/7. If B is divided by C, the result is 4/5. What is the result of A divided by C ?

A=5 when B=7, B=4 when C=5. (Using Ratios, 5:7 & 4:5) Knowing the relationship between both A & C with B means that we can find the relationship between A&C themselves. (A=5, B=7)*4 ; A=20 when B...
IA
Answered by Inez A. • Maths tutor
3595 Views

Solve the simultaneous equation: 2x + y = 18 and x−y=6

Check to see if the number in front (coefficient) of either the x's or y's is the same. In this case both the y's have the same coefficient so we do not need to make them the same.We are going to add the par...
CK
Answered by Chelsea K. • Maths tutor
5112 Views

How do I find the roots of a quadratic equation?

A quadratic equation has the form ax 2 + bx + c Our goal is to find values of x such that ax 2 + bx + c = 0These values of x are known as the "roots" of the quadratic. Exercise: Find the roots of x...
ZT
Answered by Zach T. • Maths tutor
3587 Views

How do you work out the median of a set of numbers?

The median is the middle number of a set of ordered numbers, i.e. halfway along. To find the median of the data set you should arrange the numbers into order, lowest to highest. Count equally from both ends ...
LK
Answered by Lydia K. • Maths tutor
3609 Views