Free Printable Subject Change of Formula

1.

Make a the subject of
a + b = c

a)

a = c - b

b)

a = b - c

c)

a = b + c

d)

a = bc

2.

Make x the subject. $y=2-5x$

a)

$x=\frac{2-y}{5}$

b)

$y-2=5x$

c)

$\frac{-2+y}{5}=x$

d)

$y-2=-5x$

3.

Make a the subject of
a + b = c + d

a)

a = c + d - b

b)

a = b + c + d

c)

a = b + c - d

d)

a = c - b - d

4.

Make w the subject of
A = lw

a)

w = A/l

b)

w = l/A

c)

w = A - l

d)

w = Al

5.

Make x the subject of y = mx + 1

a)

x = (y - 1)/m

b)

x = y - 1/m

c)

x = y/m - 1

d)

x = my - 1

6.

Make r the subject:
C = 2πr

a)

r = C/2π

b)

r = C - 2π

c)

r = 2πC

d)

r = Cπ/2

7.

Which of the following has "a" as the subject of the formula?

a)

b)

c)

d)

8.

ax + c = R
(solve for x)

a)

ax = R + c

b)

ax = R - c

c)

x = a(R-c)

d)

x = ^(R-c)/_a

9.

Solve for y:
3x + y = 12

a)

y = -3x +12

b)

x = y + 4

c)

x = y + 12

d)

y = 3x -12

10.

$ax+r\ =\ 7\ \ Solve\ for\ r.$

a)

$r=\frac{7}{ax}$

b)

$r=7-ax$

c)

$r=7+ax$

d)

$r=7ax$

11.

$IR=V$ $Solve\ for\ R$

a)

$R=IV$

b)

$R=\frac{I}{V}$

c)

$R=\frac{V}{I}$

d)

$R=V-I$

12.

$dx+e=f$
Which expression represents the value of x in the equation:

a)

$x=\frac{f+e}{d}$

b)

$x=\frac{f-e}{d}$

c)

$x=\frac{d}{e-f}$

d)

$x=\frac{d}{e+f}$

13.

A=5ab make b the subject

a)

b=A/5a

b)

b=5Aab

c)

b=5Ab

d)

b=5a/A

14.

Make x the subject

a)

$x=\frac{3+8y}{y-1}$

b)

$x=\frac{y-3}{y+8}$

c)

$x=xy-8y-3$

d)

$x=\frac{8y-3}{y+1}$

15.

Make w the subject

a)

$w=5g-gw$

b)

$w=\frac{g-1}{5g}$

c)

$w=gw-5g$

d)

$w=\frac{5g}{g-1}$

16.

Make b the subject of the formula $A=\frac{1}{2}\left(a+b\right)h$ .

a)

$b=\frac{h}{2A}-a$

b)

$b=\frac{2A}{h}+a$

c)

$b=\frac{2A}{h}-a$

d)

$b=\frac{h}{2A}+a$

17.

Make s the subject of the formula $v^2=u^2+2fs$ .

a)

$s=\frac{v^2+u^2}{2f}$

b)

$s=\frac{v^2-u^2}{2f}$

c)

$s=\frac{v^2}{u^2-2f}$

d)

$s=\frac{u^2}{v_{ }^2+2f}$

18.

$Make\ x\ the\ subject\ of\ the\ formula\ \sqrt{\frac{m}{x}}=n.$

a)

$x=\frac{m}{n}$

b)

$x=\frac{m}{n^2}$

c)

$x=\frac{n^2}{m}$

d)

$x=mn^2$

19.

Make x the subject of this formula.

$y=x^2+4$

a)

$x=\sqrt{y-4}$

b)

$x=\sqrt{y+4}$

c)

$x=\sqrt{y}-4$

d)

$x=\sqrt{y}+4$

20.

Make r the subject:
A = πr²

a)

r = √(A/π)

b)

r = √Aπ

c)

r = Aπ²

d)

r = (Aπ)²

Subject Change of Formula

Total questions: 20

Worksheet time: 1hrs 2mins

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