Solving quadratic equations by using the formula | Maths

Starter quiz

Using the formula $3m = 20x + 12y$ , if $x = 3$ and $y = 9$ , what calculation would find $m$ ?
- $\frac{12 \times 3 + 20 \times 9}{3}$
- $\frac{20 \times 3 + 12 \times 9}{3}$ ✓
- $\frac{20 \times 3 + 12 \times 3}{9}$
Using the formula $2m = 14x + y$ , if $x = 8$ and $y = 5$ , what calculation would find $m$ ?
- $\frac{14 \times 8 + 5}{2}$ ✓
- $\frac{5 \times 8 + 14}{2}$
- $\frac{14 \times 8 + 2}{5}$
Using the formula $x = 3a + t^2$ , if $a = 5$ and $t = 6$ , what calculation would find $x$ ?
- $3 \times 5 + 2^6$
- $3 \times 6 + 5^2$
- $3 \times 5 + 6^2$ ✓
Using the formula $x = 3a + t^2$ , if $a = 3$ and $t = 1$ , what calculation would find $x$ ?
- $3^2 + 1$ ✓
- $1^2 + 3$
- $3^2 + 11$
Rearrange $3m + t + 12 = 14g$ to make $t$ the subject
- 't = 14g - 3m - 12' ✓
Rearrange $3m - 5 = 14g - w$ to make $w$ the subject
- 'w = 14g - 3m + 5' ✓