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Expand and simplify 3(x-2) -2(x+2)

Notice that the questions specifies that you should expand and simplify. This means expanding the equations is a good idea. To expand the equation, we will start by expanding each brackets. 3(x-2)-2(x+2) =3x...
PP
Answered by Phrances P. • Maths tutor
8347 Views

Find an equation of the line which passes through the point (4,-7) and has slope 3.

To find the answer to this, we can use the point-slope form. To do this: y - (-7) = 3 (x - 4) Simplified: y + 7 = 3x - 12 : y = 3x - 19
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Answered by Tierney R. • Maths tutor
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Solve the simultaneous equation 6y+3x=24, 4y+5x=28

30y+15x=120 12y+15x=84 18y=36 y=2 4(2)+5x=28 8+5x=28 5x=20 x=4
JB
Answered by Jake B. • Maths tutor
3885 Views

Write 180g as a fraction of 3Kg. Give your answer in its simplest form.

When thinking about making a fraction out of two numbers you need to find a common denominator. With this example to be able to compare 180g and 3kg you need to find the common denominator between the two. H...
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Answered by Sanae A. • Maths tutor
36013 Views

What does it mean for a function to have one to one mapping?

One to one mapping means is that there's only one value you could insert into the function that would give you a certain output. f(x) = 2x+1 is an example of one to one mapping where 3, for example, is the o...
JM
Answered by Joshua M. • Maths tutor
13551 Views