Formulae and Substitution

If  $x=4$   solve  $5x^2-x+2x$  

The formula $s=d.t$  , if d = 5 and t = 34.

What is the value of s?

If Lynnea has some pencils and and Kiera has three times as many as Lynnea. Write an equation for the total P pencils they have. (Note: pencil = x)

If a = 4, b = 1, c = (-3) 

find the value of  $8-\frac{ac^2}{b}$   

When a = 3, b = 4 and c = 5.
Work out the value of the following expressions of
  $2a^2+c^2$  

solve

Rearrange to make y the subject
 $4y+c=w$  

Write the formulae that can be used for expressing the table

The formula  $v=u+a.t$   is used to find the final speed. 

Find v if u = 6, a = 2 and t = 5.

When x = 3, y = 6 and z = 7, 

find  $2x-z$