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Solve: (6x + 4)/(2x - 2) + 6 = 8

(6x + 4)/(2x - 2) + 6 = 8 (subtract 6 from both sides) (6x + 4)/(2x - 2) = 2 (multiply both sides by (2x - 2)) 6x + 4 = 2(2x - 2) 6x + 4 = 4x - 4 (add 4 to both sides) 6x + 8 = 4x (subtract 4x from both side...
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Answered by Emma F. • Maths tutor
6497 Views

Why do we have to use radians instead of degrees?

Radians are used a lot in A level maths because at higher levels, they allow for simplification of trigonometric functions. For example, when using radians, it can be said that: Sin(angle) ≈ angle Cos(angle)...
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Answered by Jamie S. • Maths tutor
8873 Views

Make y the subject of the formula x=(2y-1)/(4-y)

1st step: we multiply the equation by (4-y) and we get: x(4-y)=(2y-1) 2nd step: we bring the equation to the form: 4x-xy=2y-1 3rd step: now we isolate all the y terms on the same side: 2y+xy=4x+1 4th step: w...
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Answered by Andrea B. • Maths tutor
12079 Views

John ran a 450m race (2sf) in a time of 62 seconds (nearest second). Calculate the difference between his maximum and minimum average speed. (3sf)

S=D/T Max= 455(upper bound)/61.5(lower bound)= 910/123 m/s Min= 445(lower bound)/62.5 (upper bound) = 178/25 m/s Max - Min= 856/3075 m/s
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Answered by Christopher R. • Maths tutor
4396 Views

There are 45 pupils in a class, 1/9 travel to school by train, 2/5 travel to school by car, 2/9 take the bus. Find how many students walk

First the number of children that travel by train can be found by dividing 45 by 9 to give 5. Since we know that double as many take the bus, as 2/9 is the double of 1/9,5x2=10 children take the bus. Then we...
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Answered by Karina S. • Maths tutor
14904 Views