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
Answered by Lavana C. Maths tutor

2184 Views

See similar Maths 11 Plus tutors

Related Maths 11 Plus answers

All answers ▸

12 + 37 + 47


The function f is defined by f (x) = e ^(x+2), where x is any real number. Find f ^-1(x) and state its domain.


How to divide or multiply by 10s, 100s, 1000s


How many quarters are there in 8?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences