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lana66690 [7]
3 years ago
7

1.2, 3, 7.5, 18.75, ... Which formula can be used to describe the sequence? a.F(x) = 1.2(2.5)^x – 1 b.F(x) = 2.5(1.2)^x – 1 c.F(

x) = 1.2(2.5)^x d.F(x) = 1.2(2.5)^x
Mathematics
2 answers:
Firlakuza [10]3 years ago
7 0

Answer:

  a.  F(x) = 1.2(2.5)^(x – 1)

Step-by-step explanation:

The sequence is geometric with first term 1.2 and common ratio 3/1.2 = 2.5. The explicit formula for such a sequence is ...

  a[n] = a[1]·r^(n-1)

For a[1] = 1.2 and r = 2.5, and using x as the term number, the formula is ...

  F(x) = 1.2·2.5^(x-1) . . . . . matches selection A

Mama L [17]3 years ago
6 0

Answer:

Answer: "f(x) = 1.2(2.5)x-1"

Step-by-step explanation:

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6x - 4x = 2x
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3 years ago
For which equation does it make the most sense to solve by completing the square?
daser333 [38]

The equation for which square method is possible is x²-8=1

Step-by-step explanation:

For checking which of the equation satisfies the complete square condition, we proceed by checking each of the available options

1). x²+20x=52

Rewriting it as  x²+20x-52

This binomial expression is not a perfect square since the product of the coefficient of x²(i.e. 1) and independent constant (i.e. 52) is not a perfect square.

2). 5x² + 3x = 9

This equation can be rearranged as 5x²+3x-9=0

This binomial expression is not a perfect square since the product of the coefficient of x²(i.e. 5) and independent constant(i.e. 9) is not a perfect square.

3.) x² −8=1

This equation can be rearranged as  x²=9

Hence x= ±3

This binomial expression is a perfect square and can be done by the square method.

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8 0
4 years ago
HELP ASAP <br><br> Convert the measurement.<br> 15 meters =___centimeters
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Answer:

1500

Step-by-step explanation:

Hope this helps~ :D

8 0
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4 0
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PLEASE HELP ASAP!!! I NEED CORRECT ANSWERS ONLY PLEASE!!!
Aliun [14]

Answer:

The answer to your question is 4.5

Step-by-step explanation:

Data

hypotenuse = h = 6

angle = α = 42°

adjacent side = DE

Process

Use trigonometric functions to solve this problem

1.- The trigonometric function that relates the adjacent side and the hypotenuse is cosine

Cosα = \frac{adjacent side}{hypotenuse}

Solve for adjacent side = DE

        DE = hypotenuse x cos α

Substitution

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Simplification

         DE = 6(0.74)

Result

         DE = 4.5        

4 0
3 years ago
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