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pochemuha
3 years ago
9

Find the Nth term of the sequence 5, 9, 13, 17, 21Required to answer. Single choice.

Mathematics
1 answer:
lianna [129]3 years ago
5 0
Adds 4 each time and 5-4=1 so nth term is 4n + 1
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Help please don't get it!!!!!!!!!!!!!!
Zielflug [23.3K]
Answer: Choice A) 1/9

--------------------------------------------
--------------------------------------------

Work Shown:

Replace every x with -4 and then simplify the right side

f(x) = 9(3)^x
f(-4) = 9(3)^(-4)
f(-4) = 9*(1/(3^4)) See note below
f(-4) = 9*(1/(3*3*3*3))
f(-4) = 9*(1/81)
f(-4) = 9/81
f(-4) = 9/(9*9)
f(-4) = 1/9

Note: I used the rule x^(-n) = 1/(x^n) which allows us to convert from negative exponents to positive ones. 
3 0
3 years ago
She purchased 40% of the copies in the store. She has 80 copies of the cd. How many cd were on sale
mafiozo [28]
To find the number of CD on sale, we can set an equation.

Let y be the number if CD.

As she bought 40%, the amount she bought= 40%y

The equation:

40%y = 80

0.4y = 80

y = 80÷0.4

y=320

Therefore there were originally 320 CDs.

Hope it helps!
8 0
3 years ago
Will give brainliest!<br><br> Give an example of an undefined term and how it relates to a circle
Pani-rosa [81]

Answer:

an example of an undefined term and how it relates to a circle

Step-by-step explanation:

To learn why and more about circles go to this website:

windowseat.ca/circles

8 0
3 years ago
Which value of x makes the equation -5(x-3)=-25​
Mnenie [13.5K]

Answer:

x=8

Step-by-step explanation:

-5(x-3)=-25

Divide each side by -5

-5/-5(x-3)=-25/-5

x-3 = 5

Add 3 to each side

x-3+3 = 5+3

x = 8

4 0
3 years ago
Read 2 more answers
8. The expression below is evaluated when x = 9, y = 3,
Reptile [31]

Answer:

64

Step-by-step explanation:

First of all substitute the values to where ever you see their corresponding variables to make them multiply.

x = 9

y = 3

z = 2

so we get

8x as 8(9),

7z as 7(2)

2y as 2(3)

then the it's will be

8(9) - 7(2) + 2(3)

which is

72 - 14 + 6

finally we get

64

4 0
2 years ago
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