User manual
49
On the calculator, n represents the total sum of the
weights.
n = 1 + 0.5 + 1 + 0.5.
Gxrepresents the weighted sum of his scores.
(12)(1) + (13)(0.5) + (10)(1) + (11)(0.5) = 34.
Change Anthony’s last score from 11 to 15.
v $ $ $ 15 <
% u 2
$ " " < <
If the teacher adds 4 points to Test 4, Anthony’s
average grade is 12.
Š³
Problem
The table below gives the results of a braking test.
Test No.
1 2 3 4
Speed
(kph)
33 49 65 79
Braking
distance
(m)
5.30 14.45 20.21 38.45
Use the relationship between speed and braking
distance to estimate the braking distance required for a
vehicle traveling at 55kph.
30XPlusMV_OM.flpgl Page 49 Friday, November 14, 2014 1:57 PM