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y=mx+c. If m=5, x= -3 and c=1, find y

First off multiply m and x together. This is -3*5 = -15. Next, add c to the previous result, so -15+1=-14. This gives y=-14
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Answered by Kamaal K. • Maths tutor
3690 Views

Solve for x, 15x+8 = 53

15x + 8 = 53 15x = 53-8 = 45 x = 45/15 = 3
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Answered by Sarah K. • Maths tutor
5473 Views

In a sale, the original price of a bag was reduced by 1/5. The sale price of the bag is £29.40. Work out the original price.

We currently have 80% of the original price and aim to find 100%. We know that 80% is equal to £29.40. Dividing £29.40 by 80 gives the value of 1% which is £0.3675. Multiplying this by 100 give the desired 1...
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Answered by Oliver B. • Maths tutor
14479 Views

c is a positive integer. Prove that (6c^3 + 30c) / (3c^2 +15) is an even number.

We aim to factorise the numerator. This would give 6c(c^2 + 5). We then factorise the denominator. This would give 3(c^2 + 5). Since (c^2 + 5) is present in both the numerator and denominator, it will cancel...
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Answered by Oliver B. • Maths tutor
9287 Views

Factorise this formula completely 2kx + 6ky + 4kz

2kx + 6ky + 4kz =2k (x + 3y + 2z)
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Answered by Samah K. • Maths tutor
4894 Views