5. An oven is set for 425° F. A pizza is baked in the oven, then the oven is turned off.
Graph time on the x-axis and the oven
temperature on the y-axis.

Choose the graph that matches the following system of equations: 7x + 2y = −6 6x − 7y = 21 a line includes points negative 2 comma 4 and 0 comma negative 3. a line includes points 6 comma 2 and 0 comma negative 3 a line includes points 0 comma negative 3 and 6 comma 2. a line includes points negative 2 comma 1 and negative 3 comma 4 a line includes points 0 comma negative 3 and negative 1 comma 4. a line includes points 0 comma negative 3 and negative 1 comma 3 a line includes points 0 comma 3 and negative 1 comma negative 3. a line includes points 0 comma negative 3 and negative 2 comma 4.

Which equation represents the function on the graph?

For what values of the variable x is the expression square root of 7x+14+ square root of 7-x a real number?