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

TF
Answered by Tom F. Maths tutor

9494 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

simplify and rationalise 1/ sqrt(12)


√ (6²+8²) = ∛(125a³) Find a.


When (x – 2)^2 + 7 has a minimum value, what is the value of x?


c) Sharon is organising an event. The tickets cost 12 pounds each. Sharon paid 200 pounds for the cost of the event. How many tickets will Sharon have to sell to make a profit? (2 marks)


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