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valkas [14]
3 years ago
5

Which of the following is not a possible r-value? A.0.3 B.-0.3 C.-1.6 D.0.6

Mathematics
2 answers:
sveta [45]3 years ago
8 0
|r| ≤ 1
selection C cannot be a value of r.
aliya0001 [1]3 years ago
5 0

Answer:

option C -1.6

Step-by-step explanation:

we know that

The <u>correlation coefficient</u>  r is used in statistics to measure how strong a relationship is between two variables. The value of r is always between +1 and -1

so

The value of -1.6 is not a possible r-value

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The difference between a number and its square is 20. Find the<br>numbers.​
Elena L [17]

Answer:

-4 or 5

Step-by-step explanation:

let number be x

x²-x=20

Rearrange

x²-x-20=0

(x+4)(x-5)=0

Separate

x+4=0, x-5=0

x=-4 or 5

4 0
3 years ago
A cyclist bikes at a constant speed for 22 miles. He then returns home at the same speed but takes a different route. His return
brilliants [131]
How concerned are you with how to get the answer?
Because I know the answer is 5 miles per hour
22/5= 4.4 hours
27/5= 5.4 hours

Alright this is how you solve it
Distance over time equals speed
So 22/y=x and 27/y+1=x
Start by solving for time by having these two equations equal each other
22/y=27/y+1
Cross multiply to get
22(y+1)=27y
22y+22=27y
Isolate Y
5y=22
Y=4.4
Now solve for X which is the speed, you can plug in Y to either of the two equations
22/4.4=x
X=5 miles per hour
4 0
3 years ago
Evaluate in 5.<br> A.) 0.62<br> B.) 0.70<br> C.) 1.61<br> D.) 1.95
Len [333]

Answer:

  • <u><em>option C) 1.61</em></u>

Step-by-step explanation:

The question is to evaluate the natural logarithm of 5. Natural logarithms are logarithms with base <em>e</em>.

<em>e</em> is the irrational number equal to 2.71828182845904523536028747 ... (being irrational the decimals do not end and do not have a repetition period).

Logarithms are evaluated using tables or scientific calculators.

ln (5) = 1.6094379... it is also an irrational number, so it has infinite decimals with no repetition period.

So, rounding to two decimal numbers, ln (5) = 1.61, which is the option C).

6 0
3 years ago
8 meters increased by 25%
dimulka [17.4K]
8 x 1.25 = 10
or you could do 8 x 0.25 = 2 
8 + 2 = 10
8 0
3 years ago
Read 2 more answers
How to factor expression?<br> 7p-3
saw5 [17]

Answer:

it's can't be factorise because there is nothing common in them simply.

3 0
2 years ago
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