Iwill give brainliest to best answer

23

Step-by-step explanation:

First of all substitute x with g(x) on the expression of f(x)

; (f.g)(x) = -4(2x - 6) + 7

; (f.g)(x) = -8x + 24 + 7

Then substitute the value of x with the value 1...as the question asks yu

; (f.g)(1) = -8(1) + 24 + 7

; Hence (f.g)(1) = 23

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.