Evaluate st if s = - 4 and t = 9

St meaans s times t

s=-4

t=9

st=-4 times 9

negative times positive=negative

4 times 9=36

-4 time s9=-36

st=-36

answer is - 36

To evaluate means to calculate the numerical value, so first substitute the value for each variable; if s = - 4 & t = 9

st = (-4) (9) = - 4 * 9 = - 36

So your final answer is; - 36