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Where do the two lines intersect? (a) 3x+6y= 15 (b) y= 6x -4 (GCSE-Higher Tier)

Substitute y=6x-4 into the equation 3x+6y=15 to eliminate y.You will then have the equation 3x+6(6x-4)=15.The next step is to expand the brackets given 3x+36x -24=15.The next step is to collect like terms...

Answered by Tutor114867 D. • Maths tutor

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v = u + at, u = 1 a = -3 t = 1/2, Work out the value of v.

Sub the values you have been given into the formula provided.v = u +atv = 1 + (-3 x 1/2)Solve the equation you have created, be careful to stick to rules of BIDMAS (or BODMAS)and do the calculation in the...

Answered by Olivia R. • Maths tutor

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There are only 7 blue pens, 4 green pens and 6 red pens in a box. One pen is taken at random from the box. Write down the probability that this pen is blue.

First calculate the total number of pens in the bag by adding together the amounts of each different colour.7+4+6=17Since there are 7 blue pens to chose from out of a possible 17, the probability of choos...

Answered by Olivia R. • Maths tutor

6813 Views

Jenny has 3 stacks of coins - A B and C. Altogether the coins equal £1.30. Stack B has 3 times as much money has Stack A. Stack C has 2 times as much money as Stack B. How much money is in Pile C?

3 Stacks of coins - A B CAltogether the stacks add up to 130 pence (let's work in pence so its not too confusing). So, A+B+C=130pStack B has 3 times as much money has Stack A. So B = 3A...

Answered by Mayurey K. • Maths tutor

2786 Views

1: x = 2, 2: y = x + 5 -> Solve this pair of simultaneous equations.

A set of simultaneous equations most commonly represents two lines on a graph, or perhaps a circle, with a line running through it. When you solve a set of simultaneous equations, its important to remembe...

Answered by Eddie B. • Maths tutor

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