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Rearrange 4(2x + y) = 11 + 7y to make x the subject

4(2x + y) = 11 + 7y expand the brackets8x + 4y = 11 + 7y move +4y to the other side8x = 11 + 3y move 8 to the other sidex= (11 + 3y)/8

Answered by Ashley Y. • Maths tutor

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3^a = 1/9, 3^b = 9sqrt(3) c = 1/sqrt(3). Work out the value of a + b + c

I will explain best during the interview on the whiteboard space

Answered by Eduardo C. • Maths tutor

10873 Views

A plane travels at 213 miles per hour. Work out an estimate for how long, in seconds, the plane takes to travel one mile.

213 miles/hour speed = distance/time
round 213 to 200 as only an estimate;
s=200/1 hour = 200/3600 seconds (then divide by 200 to get time for 1 mile)s = 1/18
at this speed, the plane trave...

Answered by Owen W. • Maths tutor

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A right angled triangle has sides a = 3 cm and b = 5 cm, what is the length of side c?

a^2+b^2=c^2Rearrange so that c = sqrt(a^2+b^2) = 5.83 cm

Answered by Samuel P. • Maths tutor

2630 Views

Factorise 4x+6x^2

This is factorisation by common factor, so we need to write 4x+6x² as a product. First we need to find the highest common factor of 4x and 6x² so that we can take it out, which in th...

Answered by Aoife M. • Maths tutor

5579 Views