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How do I do algebra when there is an x on both sides?

If you are trying to work out what x is, then we need to end up with something that looks like: [ x = ... ] On one side we have just 'x' and on the other side we have no ' x 's. So x = 44 is already solved a...
RB
Answered by Robbie B. • Maths tutor
3312 Views

Differentiate y = 2x^4 + 11x^2 - 5 with respect to x

There are two things to understand with this question: 'differentiate' and 'with respect to x'we differentiate when we need to find how quickly something changes, which in maths usually means the gradient of...
KD
Answered by Kieran D. • Maths tutor
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Nadia has £5 to buy pencils and rulers. Pencils are 8p each. Rulers are 30p each. She says “I will buy 15 pencils. Then I will buy as many rulers as possible. With my change I will buy more pencils.” How many pencils and how many rulers does she buy?

15 x 0.08 = £1.20 which means Nadia has £5 - £1.20 = £3.80 remaining£3.80/0.3 = 12.6 recurring so 12 whole rulers can be bought 12 x 0.3 = £3.60 spent on rulers£3.80 - £3.60 = £0.20 change remaining £0.20/0....
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Answered by Alicia T. • Maths tutor
4239 Views

Solve the equation 3x^2 +17x -6 = 0 without using a calculator

In order to solve this equation without using a calculator we will need to factorise. The first step in factorising this equation is to rewrite our 17x as two separate terms. The coefficients of these need t...
PR
Answered by Phoebe R. • Maths tutor
5628 Views

A(0,2) and B(6,5) are two points on the straight line ABCD. If AB=BC=CD find the coordinates of the point D

If AB=BC=CD then the difference between each of the points is the same. If we look at the difference between A and B we can see that B is 6 further to the right, and 3 further up. So if we then add (6,3) to ...
RV
Answered by Rebekah V. • Maths tutor
11261 Views