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Solve the simultaneous equations y=x-5 and 10y=2x+6 by elimination, and by substitution.

Elimination: Multiply equation (eqn) 1 by 2 : 2y=2x-10 Subtract modified eqn 1 from 2 : 8y=16 Divide through by 8 : y=2 Sub y=2 into eqn 1 or 2 and rearrange to find : x=7 Subsitution: Sub eqn 1 into eqn 2 :...
JR
Answered by Jack R. • Maths tutor
4082 Views

what does a value shared in the ratio 2:3 mean?

this means that there are 5 parts to share out altogether. (2+3=5) So you take the value you wish to share and divide it by 5. once you've divided the value by five, to share in the ratio 2:3 simply means to...
ET
Answered by Ewan-James T. • Maths tutor
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3/8 is the same as ?/24 ?

Look at the two fractions to see what multiplier has been used. In this case, the denominators are both known: 8 and 24. 8 has been multiplied by 3 to get a new denominator of 24. This means the numerator al...
RC
Answered by Rahul C. • Maths tutor
4205 Views

4x-y=3 and 3x-2y=1. Solve these simultaneous equations to find values for x and y.

Equation 1: 4x-y=3 Equation 2: 3x-2y=1 We have to find a common multiple between 4 and 3 so that both equations have the same first value. This means that we can get rid of the x by subtracting the second eq...
JH
Answered by Jami H. • Maths tutor
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Find the first derivative of the line equation y=x^3 + 4

dy/dx = 3x^2
HF
Answered by Harry F. • Maths tutor
4005 Views