I’m confused, it’s domain and range

Step-by-step explanation:

domain: x-values

range: y-values

Graph 8:

domain: -2 ≤ x ≤ 4 (the lowest x-value is -2 and the highest is 4)

range: 0 ≤ y ≤ 6 (the lowest y-value is 0 and the highest is 6)

Graph 9:

domain: -∞ ≤ x ≤ 0 (the lowest x-value is negative infinity and the highest is 0)

range: -∞ ≤ y ≤ 0 (the lowest y-value is negative infinity and the highest is 0)

step-by-step explanation:

∆abc has the points a(1, 7), b(-2, 2), and c(4, 2) as its vertices. formed with the point d(1, 2) as its third vertex, then ∆abd is triangle.

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.