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How do I solve simultaneous equations?

2x + y = 7 3x - y = 8 You cannot find x and y using only one equations, but using both you can! So first you have use algebra to make both equations = y. Try this for the first equation by rearranging it. Th...
SO
Answered by Stephanie O. • Maths tutor
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Solve (11-w)/4 = 1 + w

So we start off with (11-w)/4 = 1+w First of all, we will multiply both sides by 4 to make the '/4' disappear. This gives us 11-w = 4+4w Then move all the w's to one side of the equation to leave us with 7 =...
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Answered by James B. • Maths tutor
3919 Views

Simplify (k^3)^2

The rule we use here is (a b ) c = a bc Therefore, (k 3 ) 2 = k 6
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Answered by James B. • Maths tutor
10812 Views

Solve 3x² + 6x – 2 = 0. Give your solutions correct to 2 decimal places [calculator paper]

We have a quadratic equation since the highest power of x is 2. Therefore, we can use the quadratic formula, which we recall to be: x = [- b ± √(b² - 4ac) ] / 2a In accordance with the formula, we set a = 3,...
TD
Answered by Tutor90708 D. • Maths tutor
8519 Views

How do you calculate a^5 x a^16 / a^4?

When each term has the same base, add the indices that are multiplied. Then subtract the indices that are divided. a^5 x a^16 / a^ 4 = a^(5+16) / a^4 = a^ 21 / a^4 = a^(21-4) = a^17
EP
Answered by Elliot P. • Maths tutor
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