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What is 17% of 84?

We know that 17% is the same as 17/100 or 0.17 so we do 0.17*84 = 14.28.
CB
Answered by Chris B. • Maths tutor
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How do you solve quadratic equations?

A typical GCSE question will give you an equation in the from ax 2 + bx + c, x 2 - 8x + 15 = 0 for example, and ask you to solve the possible value of X. To do this we need to split the equation into two hal...
TD
Answered by Tutor55115 D. • Maths tutor
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How do you solve the following simultaneous equations? Equation 1: 2x + 3y = 13 Equation 2: 3x - y = 3

There are various ways to solve simultaneous equations. The two easiest are by elimiation and by substitution. By Elimation When solving by elimination you want to ensure that you only have one variable (x o...
LS
Answered by Luke S. • Maths tutor
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For the equation y=2x+7, what is the gradient and the y intercept?

For all straight line equations as the one above, the equation is y=mx+c where: m is the gradient, c is the y-intercept. Thus from the arrangement of the given equation, gradient = 2 and y-intercept = 7 .
MP
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2a + 6b = 24, 3a + b = 20

a + 3b = 12, a = 12 - 3b 3(12-3b) + b = 20 36-9b + b = 20 36-8b = 20 8b = 16 b = 2 2a + 12 = 24 2a = 12 a = 6
AC
Answered by Ailsa C. • Maths tutor
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