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Brums [2.3K]
3 years ago
11

What value, written as a decimal, should Lena use as the common ratio?

Mathematics
1 answer:
inn [45]3 years ago
7 0

Answer:

an=1*2.5^(n-1)

=2.5^(n-1)

Step-by-step explanation:

Complete question below:

What value, written as a decimal, should Lena use as the common ratio? Lena is asked to write an explicit formula for the graphed geometric sequence. On a coordinate plane, 3 points are plotted. The points are (1, 1), (2, 2.5), (3, 6.25).

Solution

Point (1, 1), (2, 2.5), (3, 6.25).

a=1

ar=2.5

ar^2=6.25

From ar and ar^2

r=6.25/2.5

=2.5

r=2.5

an=ar^(n-1)

Therefore, the explicit formula is

an=1*2.5^(n-1)

=2.5^(n-1)

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Write the equation of a line in slope intercept form given;<br> (6,-3), (0, 5)
olganol [36]

Answer:

y=(-4/3)x+5

Step-by-step explanation:

so you want to start by using y=mx+b

step one: find the slope (remember m is the slope in this)

m= \frac{y2-y1}{x2-x1}

m= \frac{5+3}{0-6}

m= \frac{8}{-6}

m= - \frac{4}{3\\}

step two: insert the value we found for m into the equation and take one of the given points and insert the x and y into the equation (im using (0,5)) and solve for b.

y=mx+b

5= -4/3(0)+b

5=b

step three: rewrite y=mx+b with the values we found for m and for b

y=(-4/3)x+5

3 0
3 years ago
You are deciding between two carnivals to attend. Carnuval A charges an entry fee of $15. Carnival B charges $5 for entry, plus
almond37 [142]

Answer:

Step-by-step explanation:

use these two equations

A: y = 15

B: y = 2r + 5

a) set the equations equal to eachother for your first answer

15 = 2r + 5

B) solve for r

15 = 2r + 5

10 = 2r

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after 5 rides the cost will be the same

7 0
3 years ago
PLS HELP FAST!!!
katrin2010 [14]

The points have been plotted on the coordinate graph.

6 0
3 years ago
Read 2 more answers
Tatiana wants to give friendship bracelets to her 32 classmates. She already has 5 bracelets, and she can buy
Aloiza [94]

4p+5=32 or 7 packages

I got this because there are 4 bracelets in one package and she doesn't know how many packages she needs so we put p for packages next to the 4 and you already have 5 so you add the 5 to it, all of that should come out to 32. If the equation wasn't what you were looking for you subtract 5 from 32 and get 27, then you divide 4 by 27 and you get 6.75, then you round it up and you get 7. The number of packages she needs is 7.

6 0
2 years ago
The digits of this year, 2000 A.D., add up to 2. In how many other years since 1 A.D. has this happened?
DerKrebs [107]

Answer:

0002 0011 1010

0020 0101

0200 1001

2000 1100

9 times

Step-by-step explanation:

9 times is the right answer

6 0
3 years ago
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