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lora16 [44]
3 years ago
5

Phoebe compared the cost of books in 9 different stores.

Mathematics
1 answer:
krek1111 [17]3 years ago
7 0
You have to put the numbers in order and find the middle value so in this case it's-

2, 4, 4, 5, 6, 7, 8, 8, 8 

The answer is $6
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A particle p is moving along the x-axis the displacement x metres from O can be writen as x=t^5-12t²+9 find the velocity
Lisa [10]

Answer:

v = t (5t^{3} - 24)

Step-by-step explanation:

We are given an expression to solve for the displacement (x), so in order to find velocity (v), we need to differentiate the function.

============================================================

Solving :

⇒ \frac{dx}{dt} = \frac{d}{dx} (t^{5} - 12t^{2} + 9)

⇒ v = (5)t^{5-1} - (2)12t^{2-1} + 0

⇒ v = 5t^{4} - 24t

⇒ v = t (5t^{3} - 24)

Using this equation, we can find the velocity if a value of t is given.

5 0
2 years ago
Solve the system by substitution. <br><br> y = 2x<br> 3x + 2y = 21
7nadin3 [17]
Y=2x
3x+2y=21
3x+2(2x)=21
3x+4x=21
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y=6
8 0
3 years ago
Write the expression using a single exponent 2^2•2^8
kondor19780726 [428]

I think it’s C. 4^16,

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3 years ago
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