B is the one I would go with, multiplying everything by 3 in the equation 3 would eliminate y.
<span> To get an explicit formula, we need to find an expression which gives the n-th term without having to compute earlier terms in the sequence. Looking at the numbers, and from the recursive formula, we see that the sequence is built by subtracting n from the previous term. This is similar to the triangular number sequence 1,3,6,10,15,... which has the explicit formula a_n = n(n+1)/2. In our case we are subtracting n from the previous term, so we multiply by -1/2 instead of 1/2. However, we also need to add a constant term to reproduce the numbers of the sequence. We can write a_1 = -1(2)/2 + c = 8. Therefore, c = 9.
So the explict formula is:
a_n = -n(n+1)/2 + 9</span>
Answer:
<em>tan 19° = 0.3443</em>
Step-by-step explanation:
<u>Value Of Trigonometric Functions</u>
The value of the tangent of 19° cannot be expressed in exact form, that it, as a function of radicals or known constants as pi.
We need to use a calculator, computer, or similar technology to find the required value. We use a scientific calculator to get:
tan 19° = 0.3443
To the nearest ten-thousandth
Answer:
Step-by-step explanation:
Hello!
A regression model was estimated in order to test if the number of units of a restaurant chain affecta the sales of said restaurant chains.
The estimated model is:
Y= a + bX
Where
Y: is the sales of a restaurant chain
X: number of units of a restaurant chain
Looking at the computed data, the estimated coefficients are:
a= 4.633131413
b= 0.439724072
The correct regression equation to predict Sales based on Units, according to this analysis, is..
Y= 4.63 + 0.44X
I hope it helps!
