An Iphone 6S costs $449. There is a discount of 15%. What is the new cost?
2 answers:
You might be interested in
Answer:
x ≤ 2
Step-by-step explanation:
We are given the inequality:
First, get rid of the denominator by multiplying both sides by 2:
Add both sides by 6 then subtract both sides by x:
Then divide both sides by 3:
Therefore, the answer is x ≤ 2
Answer:
E (Y) = 3
Step-by-step explanation:
If a 4-sided die is being rolled repeatedly; and the odd-numbered rolls (1st 3rd,5th, etc.)
The probability of odd number roll will be, p(T) =
However, on your even-numbered rolls, you are victorious if you get a 3 or 4. Also, the probability of even number roll, p(U) =
In order to calculate: E (Y); We can say Y to be the number of times you roll.
We know that;
E (Y) = E ( Y|T ) p(T) + E ( Y|U ) p(U)
Let us calculate E ( Y|T ) and E ( Y|U )
Y|T ≅ geometric =
Y|U ≅ geometric =
also; x ≅ geometric (p)
∴ E (x) =
⇒ = 4 ; also
= 2
E (Y) = 4 × + 2 ×
= 2+1
E (Y) = 3