You are studying for your final exam of the semester. up to this point, you received 3 exam scores of 84%, 65%, and 90%. to receive a grade b in the class, you must have an average exam score between 80% and 89% for all 4 exams including the final. find the widest range of scores that you can get on the final exam in order to receive a grade of b for the class. use interval notation. a- (75,100) b-(81,100) c-(84,97)

the 3rd option is right

step-by-step explanation:

where are the images of the functions i can only see the question you typed.

step-by-step explanation:

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