The answer is D. hypotenuse ÷ opposite
(5 1/4 in)(12 1/2 in)(4 in)
(21/4)(25/2)4=262.5 in^3
The quadratic term is 2x^2.
Answer:
9
Step-by-step explanation:
Let's say Mark is M and his brother is B.
M+5=B
M+B=23
Now we can solve using subsitution.
M+M+5=23
(Subtract 5 from both sides)
2M=18
M=9
Hope this helped!