Copper costs £5 per kilogram. Zinc costs £3.20 per kilogram.
Copper and zinc are mixed in the ratio 4:1 to make brass.
Work out the cost of 7 kilograms of brass

Which of the following answers is 7/9 simplified? 7/9 2/9 11/9 2/7

If f(x) = x+8 and g(x) = 4x- 3, find (f+g)(x)

On the day a coffee shop first opened, it had 140 customers. 65% of the customers ordered a large coffee. how many customers ordered a large coffee? enter your answer in the box.