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kirill [66]
3 years ago
11

Divide. (3 3/4 )÷(−2 1/2 ) Enter your answer as a mixed number, in simplified form, in the box.

Mathematics
1 answer:
Agata [3.3K]3 years ago
8 0

Answer:

-11/14

Step-by-step explanation:  first you divide 33/4 and (-21/2), then reduce the numbers to -33/4 times 2/21 after you reduce both fractions multiply -11/2 times 1/7 and you get -11/14 your alternative form would br -0.785714


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What is the solution of the system of equations 2x-5y=11 and -2x+3y=-9
Rainbow [258]
Equation 1:
x = (5y+11)/2
Substitute equation 1 to 2:
-2((5y+11)/2)+ 3y=-9
-2/2 = -1 thus -1(5y+11)

Continue...
-(5y+11)+3y=-9
-5y-11+3y =-9
(-5+3)y= 11-9
-2y = 2
y=-1

Substitute y into equation 1:
x=(5*-1+11)/2
x = 6/2=3

So y=-1 and x =3
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Car travelling to the east is at 104 miles per hour and the car travelling to the west is moving at 114 miles per hour
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3 years ago
3. Please show your work to find the mean and standard deviation of the data. Round to the nearest tenth.
Ainat [17]
<span>16.1428571 = mean
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3 years ago
The weight distribution of parcels sent in a certain manner is normal with mean of 12 lb and standard deviation of 3 lb. The par
kicyunya [14]

Answer:

21.16

Step-by-step explanation:

Starting from the theory we have the following equation:

fi*P(x

Using the data supplied in the exercise, we have subtracting the mean and dividing by the standard deviation:

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solving for "c", knowing that fi is a tabulating value:

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therefore the value of c is equal to 21.16

8 0
3 years ago
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