Substituting 3 for x:
-4(3)+9
-12+9
-3
Answer:
Step-by-step explanation:
one batch= 12 cookies
each batch needs 0.4 cups sugar and 0.01 cups of cinnamon
Lily needs to bake 6 batches, she will need
0.4 cupsx6=2.4 cups of sugar
0.01x6=0.06 cups of cinnamon
Answer:
Yes
Step-by-step explanation:
Yes, it's a function.
If It have one more y to the same x, it's not a function.
I hope I've helped you.
Answer and Step-by-step explanation:
A) Probability of taken two odd numbered token without replacement:
P(3) = 2/5 = 0.4
P(7) = 1/4 = 0.25
Construct a probability distribution:
X 3 7
p(X) 0.4 0.25
B) Mean of the probability distribution:
E(X) = ∑xp
E(X) = 3*0.4 + 7*0.25
E(X) = 2.95
Variance of the probability distribution:
V(X) = ![\Sigma X^{2}p - [E(X)]^{2}](https://tex.z-dn.net/?f=%5CSigma%20X%5E%7B2%7Dp%20-%20%5BE%28X%29%5D%5E%7B2%7D)
V(X) = 
V(X) = 7.1475
<u>Mean</u><u> and </u><u>variance</u><u> of the probability distribution are </u><u>2.95</u><u> and </u><u>7.145</u><u>, respectively.</u>
Is there anything more to the problem?