I hope this helps you
1)
f (2)=2.2^2-3.2-7
f (2)=8-6-7
f (2)= -5
2)
f (2)=2.2^2-3.2+7
f (2)=8-6+7
f (2)=9
Answer:
X= 5, -9
Step-by-step explanation:
(X+2)² =49
Expand the bracket,
(X+2) (X+2)= 49
Apply the distributive property;
X(X+2) +2 (X+2) =49
X²+2X+2X+4=49
X²+4X+4=49
Move 49 to the left side of the equation;
X²+4X+4-49=0
X²+4X-45=0
Apply Factorisation method;
Consider the form
a²+bx+c=0
Find two numbers whose sum is equal to b and whose product is equal to c.
Comparing with our equation;
B =4 and C =45
We can use 9 and -5, this is because ;
9+(-5)=4 and 9*(-5)= 45.
Replace X +4X-45=0 with (X-5) (X+9)=0
Therefore;
X-5=0
X+9=0
Moving to the left side of the equation;
Therefore X= 5 and -9
Answer:
42 canteens
Step-by-step explanation:
1 gal = 3 canteens
14*3=42
A) 17/52
B) 15/26
C) 4/13
A) The probability of getting a club is 13/52; the probability of getting a 3 is 4/52; the probability of a club or 3 is
13/52+4/52 = 17/52
B) The probability of a red card is 26/52; the probability of a King is 4/52; the probability of a red card or King is
26/52+4/52=30/52 = 15/26
C) The probability of a 9 is 4/52; the probability of a face card is 12/52; the probability of a 9 or a face card is 4/52+12/52 = 16/52 = 4/13
Answer: Harry Potter
Step-by-step explanation:
