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Maths
GCSE

Marcin buys 7 rulers and 15 crayons for £7. A ruler costs 12p more than a crayon. Find the cost of one crayon.

To solve this problem we're going to use an equation. First let's write down the information that we do know.Let's use (r) for ruler and (c) for crayon.
So 7 rulers and 15 crayons cost £7 (or 700 pen...

Answered by Emily D. Maths tutor
8598 Views

Find the equation of the line that passes through the (4,6) and (9,-4)

First write out the general equation, y = mx + c where m = gradient and c = the Y-interceptFind the gradient m= change in y/change in xM= (-4,-6)/(9-4) = (-10)/(5) = -2Find c by substituting in either of ...

Answered by Brooke F. Maths tutor
2026 Views

Expand 2a (4 + a)

To expand is just to multiply out. We will multiply everything inside the bracket by everything inside so it becomes
2a x 4 + 2a x a
Then we use bidmas to get:
8a + 2a^2

Answered by Tatiana C. Maths tutor
2648 Views

Find the equation of the line that passes through (2, 4) and (7, -11)

Step 1) Write out the general equation of a straight line: y = mx + c where m is the gradient and c is where the line intersects the y-axis. Step 2) Find the gradient: m...

Answered by Romily G. Maths tutor
2926 Views

Write 36 as a product of prime factors. Give your answer in index form.

First write down any two factors of 36 (numbers that multiply together to give 36). Let's use 2 x 18. We now need to break these numbers down into prime factors. 2 is already a prime number, so we only ne...

Answered by Jennifer A. Maths tutor
11811 Views

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