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How do you expand brackets? eg. (2x+3)(3x+4)

Use the FOIL method for: (2x+3)(3x+4) F irst e.g. multiply first two numbers (2x and 3x) O utside e.g. 2x and 4 I nside e.g. 3 and 3x L ast e.g. 3 and 4
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Answered by Naba C. • Maths tutor
6073 Views

Solve this simultaneous equation: 5x+6y=3 and 2x-3y=12.

Firstly, I will provide a mark scheme and then a full explanation underneath. 5x+6y=3. (1) 2x-3y=12. (2). (5x+6y=3)+(2(2x-3y=12)). (5x+6y=12)+ (4x-6y=24). 9x=27. x=3. Put x is (1) 5(3)+6y=3=15+6y=3. 6y=-12. ...
AM
Answered by Ashni M. • Maths tutor
12870 Views

solve this equation: 4(x-5)=x+7

Firstly, I will provide a 'mark scheme' type answer. Then there is a full explanation available underneath. 4 (x-5)=x+7. 4x-20=x+7. 3x=27. x=9. A full explanation: 4(x-5)=x+7 (expand the equation on the left...
AM
Answered by Ashni M. • Maths tutor
11351 Views

How do I find the equation of a line that is perpendicular to another line?

Okay so let's say that the equation of the line you are given is y=2x+3 and you are told this new line must pass through the coordinates (2,4). The first thing we need to do is check we understand every bit ...
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Answered by Evie H. • Maths tutor
3766 Views

Sam uses 140g of flour to make 12 cakes. How much flour will Sam need to make 21 cakes?

140 / 12 = 11.666^. 11.66^. * 21 = 245
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Answered by Charlie N. • Maths tutor
3900 Views