Answer: f(3)=-20
Step-by-step explanation:
If you look at f(x) and f(3), you can see that 3 is in place of x. That means when x=3, what is f(x). You plug in x=3 into f(x) and solve.
f(3)=-2(3)²-2
f(3)=-2(9)-2
f(3)=-18-2
f(3)=-20
Number 4 is c because 9x9 is 81 and -9x-9=81
Answer:
A. (5, 9)
Step-by-step explanation:
The first equation tells you x=5, so the only viable choices are A and C.
The second equation tells you ...
y = 2·5 -1 = 10-1 = 9
so the only viable choice is A.
(x, y) = (5, 9) . . . . . matches choice A
We randomly select one card from 52, so there are 52 outcomes and:
We also know, that there are
face cards in a standard deck (
) and only three of them are diamonds, so
With this informations, we can calculate our probability: