Step-by-step explanation:
because angle A and C are similar, so
9x-8=28
9x=36
x=4
Answer:
I think Substitution
Step-by-step explanation:
Because x is already solved for in the second equation.
Let us try and solve it analytically. We have that the side=x+3 together with the short side=s and the diagonal=x+4 satisfy the Pythagorean Theorem. Then we have that

. This yields

which yields s^2=2x+7, hence a) is the correct answer.
? You do 5+2= 7
Is that what you are asking
This is just 15 molecules of C2 or carbon dioxide