Answer:
The first and third options are valid.
Step-by-step explanation:
If two of the three sides of a right triangle are 5 inches and 4 inches, then we have to select the equation from options that can be used to find the unknown length b, in the triangle.
The first equation 4² + b² = 5² can be the possible equation.
The second equation 4² - b² = 5², ⇒ 4² = b² + 5² can not be the equation as 4 being the hypotenuse should be the largest side but 4 < 5.
The third equation 5² + 4² = b² can be the possible equation.
The fourth equation 5² + b² = 4² is similar to the second equation. So, it is not possible.
Therefore, the first and third options are valid. (Answer)
