DISK G6- Math: Change subject of the formula -By: Mr. Bah

Make r the subject:
A = πr²

• r = √(A/π)
• r = √Aπ
• r = Aπ²
• r = (Aπ)²

Make x the subject of y = mx + c

• x = (y - c)/m
• x = y - c/m
• x = y/m - c
• x = my + c

Solve for y:
3x + y = 12

• y = -3x +12
• x = y + 4
• x = y + 12
• y = 3x -12

5(x + 2) = 3(x + 11) Solve for x

• X = 56 / 2

• X = 23 / 2

• X = 12/ 2

• X = 2/5

4 - 2x = 3(9x + 2) Solve for x

• -4 / 28

• 28 / -4

• -2 / 29

• 3 / 33

 $s=\frac{hm}{4}$  Make m the subject of the formula

•  $m=\frac{4s}{h}$  

•  $m=\frac{sh}{4}$  

•  $m=\frac{h}{4s}$  

•  $m=\frac{s}{4h}$  

 $c=\sqrt{d}+2$  Make d the subject of the formula

•  $d=\left(c-2\right)^2$  

•  $d=\left(c+2\right)^2$  

•  $d=c^2-2$  

•  $d=c^2+2$  

Make b the subject of the formula

 $a^2+b^2=c^2$  

•  $b=\sqrt{c^2-a^2}$  

•  $b=\sqrt{a^2-c^2}$  

•  $b=\sqrt{c^2+a^2}$  

•  $b=\sqrt{a^2+c^2}$  

 $ax+r\ =\ 7\ \ Solve\ for\ r.$  

•  $r=\frac{7}{ax}$  

•  $r=7-ax$  

•  $r=7+ax$  

•  $r=7ax$  

 $8x+4y=16$  

Solve for y:

•  $y=-8x+16$  

•  $y=2x-4$  

•  $y=-2x+4$  

•  $y=-8x+12$