If 3x =15 and x+y =7 what is (3y)^2?
First divide 15 by 3 to find xx= 15/3 = 5Now use x to find yx +y = 7 substitue x. 5+y=7y= 7-5= 2Now you know x=5 and y=2 use this to calculate the answer, remembering to do the sum within the brackets first.(3y)^2 = (3x2)^2 = 6^2 = 36
LC
Related Maths 11 Plus answers
All answers ▸A drawer contains ten identical yellow socks, eight identical blue socks and four identical pink socks. Amrita picks socks from from the drawer without looking. What is the smallest number of socks she must pick to be sure that she has at least two pairs
A farmer has a field that he wants to give away to his two sons. When the field is divided into two, one of his son's field has an area of 18cm (squared), work out how much area of the field his other son will get
What is 4/5 of 60?
What is 2/5 + 3/4 ?