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We can calculate the area of a circle using the following formula:A = pi x r²The area we are given is 16pi. Therefore, we can divide both sides by pi. So,16pi = pi x r²becomes16 = r<...

To answer this question, we need to form an equation to work out the nth term of the series. To do this, the first thing we do is calculate the difference between each term.7 - 3 =411 - 7 = 415 - 11 = 4Th...

To find the next three terms of the sequence, we first need to work out the pattern.The difference between the first two terms is 17 - 14.5 = 2.5The difference between the second and the third term is 14....

To begin this question, we need to subtract 11 from both sides. 3x + 11 - 11 = 56 - 11The two 11s on the left hand side cancel each other, while 56 - 11 = 45. Therefore, 3x = 45Now we need to divide both ...

To answer this question, we first need to work out the factors of 21. These are the whole numbers which multiply to make 21. We know that 1 multiplies with 21 to make 21, so they are both factors. 2 is no...