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expand and simplify (x+6)(x-8)

The method used to solve this problem can be referred to as the FOIL Method, this is an acronym that stands for First, Outer, Inner,

Answered by Poppy D. • Maths tutor

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Make r the subject of the formula: 1/r -1/p = 1/t

Take the 1/p to the other side of the equation1/r = 1/t + 1/p2) Add the fractions together by making the denominators the same1/r = (p+t)/pt3) Cross multiple by multiplying each side of the equation...

Answered by Antonia A. • Maths tutor

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John and Tom take a test. John scores p marks. Tom scores three times what John scored. Their total score is 188. What was Tom's score?

We want everything in terms of p so that there is only one unknown variable.If Tom scored 3x what John did, Tom scored 3 x p. This can be written as 3p.Their total marks are 188 so p (John's marks) + 3p (...

Answered by Sara S. • Maths tutor

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How do you prove by contradiction the irrationality of surds. Use sqrt 2 as an example.

Proof by contradiction works by working of the assumption a statement is true, then showing it contradicts with a known truth. It's easy to rote learn the main ones required for Maths A Levels (irriationa...

Answered by • Maths tutor

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Solve the simultaneous equations: 2x + y = 5 , x + 4y = -22

Showing each step of working is important.First, we need to rearrange one of the equations to solve for x or y.If we rearrange the first equation to solve for y in terms of x we get: y = 5 - 2x ( by subtr...

Answered by Joel F. • Maths tutor

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