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Trava [24]
3 years ago
12

A botanist created a linear model to predict plant height from soil acidity (pH level) for a certain type of plant. The slope of

the model was 2.5 centimeters per pH level, the standard deviation of the sample of plant heights
was 4 centimeters, and the standard deviation of the soil acidities was 1 pH level. What is the value of the correlation coefficient?
A
0.015
(B) 0.10
c. .25
d. 0.625
E
1.60​
Mathematics
1 answer:
Igoryamba3 years ago
5 0

Answer:

The answer is D. 0.625

Step-by-step explanation:

2.5=r(4/1)

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The diagram shows a triangle.<br> 490<br> 880<br> What is the value of v?<br> V =
Step2247 [10]

Answer:

43°

Step-by-step explanation:

The first thing you should do is make the equation. We should know that the sum of all the angles is 180. So it should look like this...

49+88+x=180

Combine like terms:

137+x=180

Subtract the 137 on both sides:

x= 43

That's it the value of v is 43°.

3 0
3 years ago
Read 2 more answers
Adult tickets to the fall play cost $8 and student tickets cost $4. the drama class sold 20 more adult tickets than student tick
Ganezh [65]
Let a = Adult tickets, s = Student tickets; we are going to set up a system of equations. 

8a + 4s = 880
a - s = 20

We are going to multiply the second equation by so that we can cancel out one of the variables and solve for the other. This gives you:

8a + 4s = 880
4a - 4s = 20

Notice the s-variables will cancel:

12a = 900
a = 75

Now we plug in the amount of adult tickets to solve for the student ones.

75 - s = 20
- s = - 55

Divide both sides by - 1
s = 55.

There were 55 student tickets sold and 75 adult tickets. 


6 0
3 years ago
Two companies compare their profit.
Tpy6a [65]

Answer:

Step-by-step explanation:

.4s-500=.3s-300

.1s=200

s=$2000

3 0
3 years ago
Please help will give brainliest
Irina18 [472]

Answer:

4

Step-by-step explanation:

The number of kids who like vanilla is 13 the number of kids who like strawberry is 9

13-9=4

hope this helps!!

7 0
3 years ago
Use the graphs below to find the slope of each line<br><br> (0,8),(8,1)
nignag [31]

Answer:

slope= -7/8

Step-by-step explanation:

y2-y1=1-8=-7

x2-x1=8-0=8

-7/8

6 0
3 years ago
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