Use pythagoras.
sqrt((6--12)^2 + (8--4)^2) = 6*sqrt(13) = 21.63 (2 d.p.)
Answer:
16 students got an A
Step-by-step explanation:
Set up an equation to compare the ratio to the scores:
Cross multiply:
80 = 5x
Divide each side by 5:
x = 16
Now, check if
16/8 = 2
40/8 = 5
The ratios are the same! Therefore, 16 students got an A!
Hope this helps! Feel free to contact me if you have any questions :)
27. 3(9+4)
28. 12(1+3)
29. 4(4+5)
30. 2(x+4)
31. 6(5+2x)
32. 7(6x+7)
3 • 50 = 150
4 • 20 = 80
4 • 5 = 20
150 + 80 + 20 = 250
250 - 249.30 = 0.70
So Pete should receive $0.70 in change.