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A rectangle has an area of 20 cm2. Its lengths are enlarged by a factor of 3. What is the area of the new rectangle?

Length scale factor (l.s.f) = 3
Area scale factor (a.s.f.) = 32 = 9
New area = original area x (a.s.f.) = 20 x 9 = 180 cm2

PB
Answered by Paulina B. Maths tutor
3662 Views

Solve the following simultaneous equations: 3x + y = 11, 2x + y = 8

first: look at the 2 equations and see if there are any matching coefficients. eg the same number before x or y in both of the equations. in these examples both y values have the coefficient 1. second: ei...

RS
Answered by Rebecca S. Maths tutor
3031 Views

How do I know whether to use sin, cos, or tan in trigonometry?

Label the sides of your triangleHypotenuse is the longest (opposite right angle)Opposite is opposite the given angleAdjacent is next to the given angleTwo are useful, one is irrelevant. Cross out the one ...

CH
Answered by Charlie H. Maths tutor
3205 Views

Do French adjectives go before or after the noun?

One of the main differences between English and French is the adjective position - unlike in English, where the adjective comes before the noun (e.g we would say 'the green apple'), Frenc...

KS
Answered by Kit S. French tutor
2890 Views

How do I deal with quadratic inequalities?

First of all, if not already done, you would arrange all the x's or whichever letter used on one side of the inequality. E.g. for x2+ 19x - 5 < 6x - 45 you would arrange it like: x2

AC
Answered by Asha C. Maths tutor
3026 Views

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