Astudent has grades on 3 examinations of 76,80,and 72. what must a student earn on a 4th examination to have an average of 80

92

Step-by-step explanation: 80=(76+80+72+x)/4

X=(4*80)-(76+80+72)

o= 4(i) +3

step-by-step explanation:

o is your output value and i is your input value. so, for example, if we stuck 7 in as our input, we would first multiply by 4 ( pemdas ), which equals 28. then we would add 3 to 28, for a total output of 31. this may not be a graph, but, it is a way to solve your formula..

lockers 1, 4, 9, 16, 25, 40, and 49 are open

i ran through it by the other answer is wrong