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Solve (x/4)-(2x/x+2)=1. Give your solutions to 2 decimal places.

Re-arrange to x^2-10x-8=0Using quadratic formula obtains two values, x=10.74 and x= -0.74

Answered by Will H. • Maths tutor

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A curve with equation y=f(x) passes through point P at (4,8). Given that f'(x)=9x^(1/2)/4+5/2x^(1/2)-4 find f(X).

To find f(x) using its derivative, first integrate f'(x) with respect to x using the 'add one to the power and divide by the new power' technique remembering to add the constant c. To make this easier, tu...

Answered by Em C. • Maths tutor

3311 Views

What is 64^(2/3)?

When the index of a number is a fraction such as 2/3, first take the cubic root, then square the number. For example:
64^1/3= cube root of 64(64^1/3)² = 64^2/3

Answered by James T. • Maths tutor

4996 Views

solve the simultaneous equations x^2 + y^2 = 5 and 3x+1=y

Substitute in y to the first equationx² + (3x+1)² = 510x² + 6x - 4 = 55x²+3x-2=0(5x-2)(x+1)x=2/5 or -1Sub these values of x into the first equationy=11/5 and -2...

Answered by Isabel D. • Maths tutor

2557 Views

How do I find 28% of 160?

To find more complicated percentages, we need to first be able to convert percentages into fractions. To do this, we take 100 as the denominator and the percentage as the numerator, so 28% = 28/100. Now w...

Answered by Aiman K. • Maths tutor

2424 Views