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Maths
GCSE

Solve the following simultaneous equations. 2x + 5y = -4. 7x + y = 19

Simultaneous equations have 2 or more unknowns. This simultaneous equation has 2 unknowns, and 2 equations. This simultaneous equation can be solved using elimination or substitution. Substitution ...

Answered by Aisling L. Maths tutor
2937 Views

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 divid...

Answered by Emily S. Maths tutor
2400 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...

Answered by Rebecca A. Maths tutor
5641 Views

(6^2 + 8^2)^1/2 = (125a^3)^1/3 Work out the value of a?

(62 + 82)1/2 = (125a3 )1/3(36+62)1/2 = (125a3 )1/31001/2 = (125a3 )1/3+/- 10 = (125...

Answered by Kate S. Maths tutor
3336 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...

Answered by Sophia P. Maths tutor
3970 Views

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