Ling tried to solve an equation step by step.
\qquad\begin{aligned} -2q+11&=-32 \\ -2q&=-43&\green{\text{Step } 1} \\ q&=21.5&\blue{\text{Step } 2} \end{aligned}
−2q+11
−2q
q


=−32
=−43
=21.5


Step 1
Step 2


Find Ling's mistake.

£56

step-by-step explanation:

19

step-by-step explanation:

the answer will be b x² +x-1

step-by-step explanation:

c.

step-by-step explanation:

she should of added 9^2 and 12^2. that is because it is a^2+b^2=c^2. c^2 is the hypotenuse and should always be bigger than the other two numbers. which is why she should of added 9 squared and 12 squared together instead of 15 squared.