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valina [46]
3 years ago
7

9 is the geometric mean between 4 and which other number?

Mathematics
1 answer:
KonstantinChe [14]3 years ago
5 0
Answer is A. 20.25

cause 20.25 x 9 = 81
√81 = 9
so 9 is the geometric mean <span>between 4 and 20.25</span>
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Two trains travel directly toward each other. One of the trains travels at a rate of 12 km/h while the other travels at a rate o
Schach [20]
Write the equation of the first train: x = 12t
Write the equation of the second train: y = -20t+72, assuming the train one is at the origins when t = 0. 
Now solve the equation: 12t=-20t+72, 
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Now the equation of the <span>pigeon is like this: x = 48t. 
</span>Then for t = 2.25, we get
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4 0
3 years ago
What is the equation of the line on the graph with points (-2,2) and (-2,-3)
nika2105 [10]

Answer:

x=-2

Step-by-step explanation:

Given points are (-2,2) and (-2,-3).

Now we need to find equation of the line passing through the given points.

So let's begin by finding slope

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which is undefined. That means graph of the line must be vertical as you can see that in given points, x-value is not changing.

Equation of vertical line is given by x=k where k is the fixed value of x-coordinate.

x-coordinate is -2 in given points.

Hence final equation is x=-2.

4 0
3 years ago
Cargo pants that regularly sell for $36 are now on sale for 30% off. How much is the discount ​
dalvyx [7]

Question already asked before;

brainly.com/question/202074

So,

30%=0.3

36x0.3=10.8

It is $10.80 off

7 0
3 years ago
Read 2 more answers
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Lelu [443]

Answer:

in 25 weeks the stalk grew to 4 inches - false

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the stalk grew at a rate of 6.25 inches each week - true (25/4 = 6.25)

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7 0
2 years ago
sarah has a younger brother who is 5 years younger than herself and another brother who is 8 years younger than herself. She obs
ycow [4]

Answer: 13

Step-by-step explanation:  k

4 0
3 years ago
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