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2(y+3) = 10. What is y?

So to start this question, we must multiply out the bracket as follows:2 x (y+3) = 10(2 x y) + (2 x 3) = 102y + 6 = 10Now we take away 6 from both sides of the equation:2y + 6 = 10 (NOW TAKE AWAY 6)2y = 4...

Answered by Sophie E. Maths tutor
4282 Views

P has coordinates (0, -1) and Q has coordinates (4, 1). a) Find the equation of line PQ. b) P and Q are two vertices of rectangle PQRS. Find the equation of line QR.

a) y = x/2 - 1 b) y = -2x + 9

Answered by Jules B. Maths tutor
6115 Views

5 tins of soup have a total weight of 1750 grams. 4 tins of soup and 3 packets of soup have a total weight of 1490 grams. Work out the total weight of 3 tins of soup and 2 packets of soup.

5 tins of soup have a total weight of 1750 grams.
--> from this, we can calculate the total weight of 1 tin of soup, with 1750÷5 = 350 grams
4 t...

Answered by Eszter S. Maths tutor
4215 Views

Solve (x/4)-(2x/x+2) = 1. Give your solutions to 2 decimal places. You must show your working.

We will begin by eliminating fractions in the equation. To do this, the equation will be multiplied by 4 and (x+2), as these are the denominators of the two fractions.
Multiplying by 4 gives:x - (8x/...

Answered by Dogu Z. Maths tutor
6716 Views

When you are working out dy/dx = 0, why do you do this and what does it mean?

It relates back to what we actually mean why we say dy/dx. Simply put, dy/dx means the rate of change of y with respect to the rate of change in x over a infinitely small space of time. Therefore, when we...

Answered by Matthew J. Maths tutor
21038 Views

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