Evaluate the expression when n=-4

n^2+5n+7

3

Step-by-step explanation:

When n= -4 we replace in the given formula and evaluate the answer as shown below:

(-4)^2 + 5 (-4) + 7 = 16 - 20 + 7 = 3

the system of inequalities is

step-by-step explanation:

step 1

find the equation of the dashed line

we have the points

(0,0) and (3,1)

the line passes through the origin, so, is a direct variation

find the slope

the equation of the dashed line is

the solution of the inequality a s the shaded area above the dashed line

therefore

the equation of the inequality a is

step 2

find the equation of the solid line

we have the points

(4,0) and (0,4)

find the slope

the equation of the solid line is

the solution of the inequality b s the shaded area below the solid line

therefore

the equation of the inequality b is

step 3

the system of inequalities is