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The Diagram shows the Triangle PQR. PQ = x cm. PR = 2x cm. Angle QP^R = 30 degrees. The area of the triangle PQR = A cm^2. Show that x = (Squared Root){2A

Area of a Triangle Formula is A = 1/2 abSINc Label the sides of the triangle PR = 2x = a PQ = x = b 1/2 (x) 2x (x) x (x) SINc = A = x 2 SINc Rearrange the equation to give (squared root) { A = x { SINc QP^R ...
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Answered by Tutor305386 D. • Maths tutor
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Solve the simultaneous equations 'x-2y=3' and 'x^2+2y^2=27'

Equation 1: x-2y=3Equation 2: x 2 +2y 2 =27The easiest way to do this is to put one of these equations into the other, by rearranging for either x or y. Because there are no squares to deal with in equation ...
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Answered by Tahmid K. • Maths tutor
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Make x the subject of the following formula: x/2 + 3 = y - 2

To make x the subject of the formula, we simply want to have x on its own on one side of the equals sign. So we need to remove any numbers on the same side as x. A key rule to remember is that everything we ...
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Answered by Tutor304375 D. • Maths tutor
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Make x the subject of the formula: 3x - 2 = y + 10

x = (y+12)/3
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Answered by Jameela K. • Maths tutor
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Solve 2x^2 - x - 21 by factorising

Lets begin by splitting the bx term to make factorising possible: 2x 2 - x - 21 is the same as 2x 2 - 1x - 21What two numbers = -1 when added, and = -42 when multiplied together?(note - they have to multiply...
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Answered by Lara Q. • Maths tutor
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