Which expression represents the phrase, "one fifth the sum of 14 and a number"? a) 15(14+x) b) 15(14)+x c) 15+14+x d) 15x+14

Let

x--------> the number

we know that

1) the phrase, "the sum of 14 and a number"

represent the expression -------->

and

2) the complete phrase, "one fifth the sum of 14 and a number"

represent the expression -------->

therefore

the answer is

step-by-step explanation:

assume that you have 3 different side lengths.   apply the pythagorean theorem here:   square each of the two shortest sides; call them a and b, so that their squares are a² and b².   also square the longest side, calling the result c².

now, if a² + b² = c² is true, the triangle is a right triangle; otherwise it is not a right triangle.