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Which of the fractions 6/12, 9/8, 2/3 is equivalent to 12/18?

You want to look for 12/18 in its minimal form, meaning that you cannot divide the numerator and denominator by the same number, unless that number is 1. So try to work out what the numbers are that divide b...
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Answered by Emily S. • Maths tutor
3507 Views

What is the equation of the tangent to the circle x^2 + y^2 = 25 at the point (-3, -4)?

From circle theorems, the tangent to a circle is perpendicular to the radius, and so to find the tangent we can use the gradient of the radius connecting the point (-3, -4) to the centre of the circle and th...
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Answered by Rebecca A. • Maths tutor
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(6^2 + 8^2)^1/2 = (125a^3)^1/3 Work out the value of a?

(6 2 + 8 2 ) 1/2 = (125a 3 ) 1/3 (36+62) 1/2 = (125a 3 ) 1/3 100 1/2 = (125a 3 ) 1/3 +/- 10 = (125a 3 ) 1/3 Using +10 as the left-hand side answer:10 = (125a 3 ) 1/3 1000 = 125a 3 8 = a 3 2 = aUsing -10 as t...
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Answered by Kate S. • Maths tutor
4323 Views

Find the co-ordinates where the curve y= 2x^2 + 7x + 3 crosses the x axis

At the x axis, y = 0 so the equation can be made equal to zero. For a polynomial of the form ax^2 + bx + c = 0, find the value of ac. E.G ac is 2*3 = 6. Determine the two numbers which give a sum equal to b ...
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Answered by Sophia P. • Maths tutor
5986 Views

Solve the inequality 3x+7>x-3

To solve this inequality, we need to take steps to collect like terms on each side of the inequality. To start with, we can try getting all the numbers on one side of the inequality - on the left hand side, ...
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Answered by Nick B. • Maths tutor
4087 Views