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Solve the simultaneous equations for x and y: 3x+3y=5 and 6x+5y=9

3x+3y=5 6x+5y=9Multiply the first equation by 2 to get a workable x coefficient:6x+6y=10Write the equations above each other and subtract them:6x+6y=10 - 6x+5y=9 y = 10-9y = 1 By substituting your answer for...
JC
Answered by Joe C. • Maths tutor
3774 Views

Expand (x+6)(x-3)

There are 2 handy ways of remembering how to do these questions, so I'll show you both and you can tell me which you like best. What's important to remember is to make sure you times everything in the first ...
TU
Answered by Tom U. • Maths tutor
12426 Views

How can I work out the equation of a line defined by 2 known points?

We know that the equation of a line takes up the slope-intercept form: y = mx + n ,where m is the slope and n is the y intercept To work out the equation of the line for our 2 points, we use the point-slope ...
DF
Answered by Daria F. • Maths tutor
6479 Views

Rearrange the following equation to make T the subject: (3T+A)/2 = B

T=(2B-A)/3
AB
Answered by Alice B. • Maths tutor
4253 Views

At whats points does the graph of (t^2)+8t+7 intersect the x axis

Explain to the students what a one to many functions is which in this case is a quadratic, giving them an understanding of why there are two solutions, aided with the image of the quadratic. Followed by expl...
TD
Answered by Tutor133733 D. • Maths tutor
3407 Views