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dangina [55]
3 years ago
8

Write an expression to represent: Nine less than the quotient of two and a number z.

Mathematics
1 answer:
Nina [5.8K]3 years ago
8 0

Answer:

2 / z - 9

Step-by-step explanation:

Don't worry division always goes before subtraction so you don't need any parenthesis.

Tell me if I'm wrong :)

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A department of transportation's study on driving speed and miles per gallon for midsize automobiles resulted in the following d
dezoksy [38]

Answer:

R = -0.90 (2 decimal places)

Step-by-step explanation:

Given the data :

Speed (Miles per Hour) :

30

50

40

55

30

25

60

25

50

55

Miles per Gallon :

29

26

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22

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The correlation Coefficient, R shows the degree or level of relationship between the dependent and independent variable. A positive R value denotes a positive correlation while a negative R value denotes a negative relationship. R values should range between - 1 to +1 with values close to 1 and - 1 depicting strength while value of zero means no relationship exist.

Hence, R value of -0.90 depicts a strong negative relationship. Hence, higher speed are related to lower miles per gallon and vice versa.

5 0
2 years ago
If 8x−4y=20 and 4x−8y=4, what is the value of x−y?
____ [38]

Answer:

Step-by-step explanation:

Solve the system:

8x−4y=20

4x−8y=4

Reduce the first equation by dividing every term by -2:

-4x + 2y = -10

and then combine this result with the second equation:

4x−8y=4

-4x + 2y = -10

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

      -6y = -6, and so y = 1.  

According to the first equation, if y = 1, then 4x - 8 = 4, or x = 3.

Then x = 3 and y = 1.

So, finally, x - y = 3 - 1 = 2

5 0
3 years ago
A rectangle has four sides so we double each side and add them to each other:
il63 [147K]

Answer: this many 4

Step-by-step explanation:

2(2x+7)+2(3x+8y)

=4x+14+6x+16y

=10x+16y+14

5 0
3 years ago
_________% of 50 shirts is 35 shirts what is it
Rufina [12.5K]

Answer:

the answer is 70% hope that helps!!

6 0
2 years ago
I need to find the GCF and solve to get the right answer. And ASAP if ossicle please
BartSMP [9]

I just know the greatest common factor is 2ab

But i don’t know if it is foil method but I still don’t know how to put it in that format

6 0
3 years ago
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