10 students averaged 80, so the sum of their scores was (10 x 80) = 800
20 students averaged 89, so the sum of their scores was (20 x 89) = 1,780
All together, the sum of all 30 scores was (800 + 1,780) = 2,580
30 students totaled 2,580, so their average was (2,580 / 30) = <em> 86</em> .
Answer:
(2,3)
Step-by-step explanation:
To find the x-coordinate of the midpoint, find the average of -6 and 10. It is 4/2, or 2.
To find the y-coordinate, proceed similarly. Find the average of 2 and 4. It is 3.
Thus, the midpoint is (2, 3).
26 minutes, would = 3.51. if you add .12 to that it is 3.63.
so the most that she could talk would be 26 minutes.
<h3>and health.;</h3><h3 /><h3 /><h3>HOPE THIS HELPED</h3>
Answer:
just multiply every number by 2 and it should work out.
Step-by-step explanation: