HP Prime Graphing Calculator - Manual (Page 265)

Solve app 261
Enter known
variables
4. Display the Numeric view.
M
Here you specify the values
of the known variables,
highlight the variable that
you want to solve for, and
tap .
5. Enter the values for the
known variables.
2 7
. 7 8 E 1 6 . 6 7 E\ 1 0 0 E
N o t e Some variables may already have values against them when you
display the Numeric view. This occurs if the variables have been
assigned values elsewhere. For example, in Home view you
might have assigned 10 to variable U: 10
U. Then when
you open the Numeric view to solve an equation with U as a
variable, 10 will be the default value for U. This also occurs if a
variable has been given a value in some previous calculation (in
an app or program).
To reset all pre-populated variables to zero, press SJ .
Solve the
unknown
variable
6. Solve for the unknown variable (A).
Move the cursor to the A
field and tap
.
Therefore, the acceleration
needed to increase the
speed of a car from 16.67
m/s (60 kph) to 27.78 m/s
(100 kph) over a distance of
100 m is approximately 2.4692 m/s
2 .
The equation is linear with respect to the variable A. Hence
we can conclude that there are no further solutions for A. We
can also see this if we plot the equation.