Answer:
$20.06
Step-by-step explanation:
17 x 0.18 = 3.06 Multiply the cost by the tip percent
17 + 3.06 = $20.06 Add the tip amount to the original cost
Hello :
<span>the numbers are : x , y
x - y = 4...1)
xy = 96...(2)
by (1) : x = y +4...(*)
subsct in (2) : (y+4) y = 96
y² +4y -96 = 0
(y² +2(2y) +2²) -2² -96 = 0
(y+2)² -100 =0
</span>(y+2)² <span>= 10²
y +2 = 10 or y+2 = -10
y = 8 or y = -12 ( refused : x is positif)
y = 8
</span>subsct in (*) : x = 8+4 = 12
<span> the numbers are : 12 and 8
12-8 = 4 and 12×8 = 96</span>
Answer:
Sample relative risk is 4.
Step-by-step explanation:
We are given the following in the question:
Group 1 of smokers: 10 out of 100 get lung cancer.
Group 2 of non-smokers: 5 out of 200 get lung cancer
Sample relative risk:
- It is the ratio of probability of an outcome in an exposed group to the probability of an outcome in an unexposed group.
Sample relative risk =
Thus, sample relative risk is 4.
I recommend using the Rational root theorem and finding the zeros through synthetic division. The first zero is x = 1, so the first factorization is (x-1). That leaves a remainder of x^2 -3x-10. Now try to factor that. That factors out to (x-5)(x+2) so the factors of that cubic are (x-1)(x-5)(x+2)