Which best explains whether a triangle with side lengths 5 cm, 13 cm, and 12 cm is a right triangle?

the triangle is a right triangle because 52 + 122 = 132.
the triangle is not a right triangle because 5 + 13 > 12.
the triangle is not a right triangle because 52 + 132 > 122.
the triangle is not a right triangle because 5 + 12 > 13.

Math it's appreciated. (picture provided)

Merrida uses a pattern in the multiplication table below to find ratios that are equivalent to 7: 9. if merrida multiplies the first term, 7, by a factor of 6, what should she do to find the other term for the equivalent ratio? multiply 9 by 1. multiply 9 by 6. multiply 9 by 7. multiply 9 by 9.

Asales representative from a local radio station is trying to convince the owner of a small fitness club to advertise on her station. the representative says that if the owner begins advertising on the station today, the club's total number of members will grow exponentially each month. she uses the given expression to model the number of club members, in hundreds, after advertising for t months.