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

9592 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

When should I use the quadratic formula?


Write down the length of side "a"


Find where the equation y = x^2 + x - 2 crosses the x-axis.


Let f(x)= x/5 + 1 . Find f^-1(x)


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