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Phantasy [73]
2 years ago
12

Suppose your business has a special checking account used for paying the cable bill. The balance is 800.00 this month. Next mont

h will be 717.50, after that it will be 635.00, and on the third it will be 552.50. Which best illustrates this situation
800(82.5)^x
-82.5(800)^x
-82.5x + 800
x^2 - 82.5x + 800
Mathematics
1 answer:
Lorico [155]2 years ago
3 0

Answer:

D or B

Step-by-step explanation:

took the test!!!!!!!

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the eccentricity of a hyperbola is defined as e=c/a. find an equation with vertices (1,-3) and (-3,-3) and e=5/2
Ksivusya [100]

Answer:

\frac{(x + 1 )^{2} }{4} - \frac{(y + 3 )^{2} }{21} = 1.

Step-by-step explanation:

If (α, β) are the coordinates of the center of the hyperbola, then its equation of the hyperbola is \frac{(x - \alpha )^{2} }{a^{2} } - \frac{(y - \beta )^{2} }{b^{2} } = 1.

Now, the vertices of the hyperbola are given by (α ± a, β) ≡ (1,-3) and (-3,-3)

Hence, β = - 3 and α + a = 1 and α - a = -3

Now, solving those two equations of α and a we get,  

2α = - 2, ⇒ α = -1 and

a = 1 - α = 2.

Now, eccentricity of the hyperbola is given by b^{2} = a^{2}(e^{2}  - 1) = 4[(\frac{5}{2} )^{2} -1] = 21 {Since e = \frac{5}{2} given}

Therefore, the equation of the given hyperbola will be  

\frac{(x + 1 )^{2} }{4} - \frac{(y + 3 )^{2} }{21} = 1. (Answer)

6 0
2 years ago
If w= -1, x =6 and y= -3, find the following<br><br> 3w² - 5w + 1
drek231 [11]

Answer:

3

Step-by-step explanation:

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3x3 = 9

9-5+1

9-6 = 3

8 0
3 years ago
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An expression with 18 and 20.

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