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Solve these simultaneous equations (2x+y=7 and 3x-y=8) and find the values of Equation: x and Equation: y .

-First of all add these two equations together so that the y s get eliminated. 5x=15 x=3 Since you have found the answer to x which is 3, substitute x into the equation 2x+y=7. 2*3+y=7 6+y=7 Therefore y=1 an...
VF
Answered by Vanessa F. • Maths tutor
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Express 300 as a product of its prime factors.

Factors of a number are: numbers that can be multiplied (by a whole number/ integer) to make the original number. For example, 6 is a factor of 42, because 6 can be multiplied by 7 to make 42. Prime numbers ...
AM
Answered by Alice M. • Maths tutor
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How do you solve quadratic and linear simultaneous equations?

For two linear simultaneous equations, two algebraic methods can be used to find solutions.The first is elimination, which is usually a lot quicker. Elimination involves subtracting one equation form the oth...
JA
Answered by Jack A. • Maths tutor
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What are volumes of revolution and how are they calculated?

Volumes of revolution are contructed by a fuction of x, y=f(x), rotated 360 degrees, or 2pi radians around the x asxis. For example, a function of y=2 would create a cylinder of radius 2 in its volume of rev...
JA
Answered by Jack A. • Maths tutor
9675 Views

N = 2A + B. A is a two-digit square number. B is a two-digit cube number. What is the smallest possible value of N?

A is a 2-digit square number. In order to find the smallest N number we want to find the smallest possible 2-digit sqaure number. To sqaure a number means to multiply this number by itself, e.g. the square n...
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Answered by Silvia K. • Maths tutor
8369 Views