2f(2Answer:
Step-by-step explanation:
f(1)=8
f(2)= 2(8) = 16
f(3) = 2(16) = 32
f(4) = 2(32) = 64
f(5) = 2(64) =128
Answer:
1 only
Step-by-step explanation:
because it talks about a coin and a dice and the rest is about cards
I think 42 but Im not sure just thought it out.
Answer:
The required equation is
.
Step-by-step explanation:
If a quadratic equation is
, then the quadratic formula is

The given quadratic equation is

Here, a=1, b=-9 and c=-20.
Substitute a=1, b=-9 and c=-20 in the above quadratic formula.

Therefore the required equation is
.
Answer:
Step-by-step explanation:
3x+4y=−23.........(1)
x=3y+1 .........(2)
Putting (2) in (1)
3(3y + 1) + 4y = -23
9y + 3 + 4y = -23
9y + 4y = -23 - 3
13y = -26
y = -26/13
y = -2
Putting y into (2)
x=3y+1
x = 3(-2) + 1
x = -6 + 1
x = -5