Multiply out and simplify 10(2\(x \) – 1) – 20\(x \)
Answer
20\(x \)
-10\(x \) - 10
-10
Question 4
Question
A company receives 1250 orders in December. It has a January sale. It receives 1430 orders in January. Work out the percentage increase in orders.
Answer
14.4%
1.44%
12.58%
Question 5
Question
Use approximations to estimate the value of \(\frac{402.5}{2.19 x 38.7}\)
Answer
6
4
5
Question 6
Question
Expand \(w\)(\(w\) + 6)
Answer
\(w^2\) + 6\(w\)
6\(w^2\) + \(w\)
\(w\) = 6
Question 7
Question
Factorise fully 8\(y\) + 20
Answer
\(y\)(8 + 20)
\(y\) = 2.5
4(2\(y\) + 5)
Question 8
Question
Post and packing on a parcel is £8.00 for delivery in the UK. This increases by 40% if the parcel is sent to the USA. Work out the cost to send the parcel to the USA.
Answer
£3.20
£11.20
£4.80
Question 9
Question
Write 126 as a product of prime factors.
Answer
3 x 2 x 2 x 5
1 x 126
2 x 3 x 3 x 7
Question 10
Question
Alice has £4. Billie has twice as much as Alice. Billie has two-thirds of the amount Chris has. The amount Chris has is four-fifths of his age in years. How old is Chris?