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The area of a square is 49cm^2. The perimeter of the square is equal to the circumference of a circle. what is the radius of the circle?

This is a geometry question. We know that a square has 4 equal sides of x, and that it's area is given by A=x 2 . So we can work out the length of the side of the square. x=sqrt(49) = 7 We are told this is e...
JC
Answered by Julia C. • Maths tutor
16251 Views

In the field of genetics what does the term "mutation" describe?

A mutation is a change in the sequence of nucleotides that make up DNA. This can be caused by a range of internal and external factors. Mutations within the coding region of genes can lead to changes in the ...
JB
Answered by James B. • Biology tutor
7417 Views

How to solve polynomials

First of all let's start with a lttle explanationn of waht a polynomial is. A polynomial is a function of x denoted f(x) which is defined as f(x)=a 0 +a 1 x+. . .+a n x n which in other words is a sum of x's...
PW
Answered by Piotr W. • Maths tutor
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Solve these simultaneous equations: y=3x-10; y=2x+5

Method 1 (algebraically): Since we have "y=" at the start of both equations, we can substitue one into the other to get 3x-10=2x+5 Then we want all the x terms on one side of the equation, and all ...
CW
Answered by Catherine W. • Maths tutor
11119 Views

How would I solve y=3x, 2x+y=5 using the substitiution method?

y=3x (1) 2x+y = 5 (2) Here we are being asked to find what the value of x and y is. It is asking us to substitute either x or y into the equation to help us find our solution. Now substitue means remove some...
SJ
Answered by Samantha J. • Maths tutor
10116 Views