Solve the following system of linear equations by substitution and determine whether the system has one solution, no solution, or an infinite number of solutions. If the system has one solution, find the solution. x-7y= -4
x+y=28

jer7ubdfti + kjdxyubxsf9+;plokjhgf23456789mnb kjhgfdsw345678iol, xxder45677777778 *>*

Step-by-step explanation:

good job you smart son of a gun you are smarter that einstein. 7

step-by-step explanation:

we have

using a graphing tool

see the attached figure

this is a quadratic equation (vertical parabola) open up

the vertex is a > vertex

the domain of the function is all real > interval (-∞,∞)

the range of the function is the > [-6.125,∞)

the function has two x->   and

the function is increasing over the > (0.25,∞)

the function is decreasing over the > (-∞,0.25)