Work out the value of 4a + 2b when a = 4 and b = 3.

first substitute all the values you know into the formula (use brackets to make your work clear)

4(4) + 2(3)

we know that 2 numbers next to eachother means multiply so expand it 

4 x (4) + 2 x (3)

using BODMAS we know to do the multiplications first then add the 2 products 

16 + 6

 = 22

so 4a + 2b = 22 when a = 4 & b = 3

Answered by Tom F. Maths tutor

9486 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

(x+3)(x-4)(x+5) is identical to x^3 +ax^2 -17x+b. Find the value of a and the value of b.


How do I draw a pie diagram?


Expand the brackets: (2m-3)(m+1)


Why do you need simultaneous equations?


We're here to help

contact us iconContact usWhatsapp logoMessage us on Whatsapptelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

© MyTutorWeb Ltd 2013–2025

Terms & Conditions|Privacy Policy
Cookie Preferences