Changing subject (Quiz)

Changing subject (Question 1)

Make the variable in the bracket the subject of the formula[br][br][math]y=3x-6p\left[p\right][/math]

[math]p=y-\frac{x}{2}[/math] [math]p=\frac{y-3x}{6}[/math] [math]p=\frac{x}{2}-y[/math] [math]p=\frac{3x-y}{6}[/math]

Changing subject (Question 2)

Make the variable in the bracket the subject of the formula[br][br][math]\frac{8n}{n-m}=3m\left[n\right][/math]

[math]n=-\frac{m}{5}[/math] [math]n=\frac{m^2}{3m-8}[/math] [math]n=\frac{3m^2}{3m-8}[/math] [math]n=-\frac{m}{8}[/math]

Changing subject (Question 3)

Make the variable in the bracket the subject of the formula[br][br][math]\frac{a}{b+c}=\frac{3}{2b-c}\left[c\right][/math]

[math]c=\frac{2ab+3b}{a-3}[/math] [math]c=\frac{2ab+3b}{a+3}[/math] [math]c=\frac{2ab-3b}{a+3}[/math] [math]c=\frac{2ab-3b}{a-3}[/math]

Changing subject (Question 4)

Make the variable in the bracket the subject of the formula[br][br][math]a+2b+3c=9+4ac+5b-7bc+8a\left[a\right][/math]

[math]a=\frac{7b+3c+7bc-9}{4c+7}[/math] [math]a=\frac{7b+3c+7bc+9}{4c-7}[/math] [math]a=\frac{7b+3c+7bc-9}{4c-7}[/math] [math]a=\frac{7b+3c+7bc+9}{4c+7}[/math]

Changing subject (Question 5)

The two common units of temperature are degree Celsius ([math]^0C[/math]) and degree Fahrenheit ([math]^0F[/math]). The relation between these two units is given by the formula [math]F=\frac{9}{5}C+32[/math][br][br]a) Make C the subject of the formula[br][br]b) If Peter measures today's room temperature in degree Fahrenheit and obtained [math]47^0F[/math], what is the room temperature today in degree Celsius?