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Alexus [3.1K]
3 years ago
8

Which expressions are differences of squares?

Mathematics
2 answers:
Alexus [3.1K]3 years ago
6 0
The answer is: w^2-121 and a^2-36. I am taking this test now. 

STALIN [3.7K]3 years ago
6 0
Your answer is C and D :) 
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Describe the sample variance using words rather than a formula. do the same with the population variance
Korvikt [17]

The option D is the correct option.

According to the statement

we have to define the sample variance in the words.

So,

The sample variance is the sum of the squared deviations from the mean divided by the number of measurements minus one.

and in the case of the population variance it becomes

The population variance is the average of the squared distances of the measurements on all units in the population from the mean.

This is the method by which we define the sample variance and population variance.

So, The option D is the correct option.

Learn more about the VARIANCE here brainly.com/question/15858152

#SPJ4

3 0
2 years ago
What is the exact distance from (-5, 1) to (3,0)?
Vlada [557]
Distance is calculated by the square root of (x2-x1)^2 + (y2-y1)^2

We simply substitute the values into this formula

Square root of (3--5)^2 + (0-1)^2

Which is 8
8 0
3 years ago
Bob cycles 5.4 km every morning.how many feet are in 5.4 km, given that 1 mile=1.609 km and 1 mile=5,280 feet?
creativ13 [48]

Answer:

17,720 ft

Step-by-step explanation:

5.4 km * (1 mile)/(1.609 km) * (5280 ft)/(1 mile) = 17,720 ft

5 0
3 years ago
Madison’s band used to practice for 50 minutes every Tuesday. Now they practice 130% as many minutes as they used to. How many m
yKpoI14uk [10]

Answer:

it is 65 :)

Step-by-step explanation:

3 0
3 years ago
_ Is –7 + 9 positive or negative
Yanka [14]

Answer:

Positive 2

Step-by-step explanation:

its like ur subtracting 9+ (-7)

its basically 9-7=2

but not all problems r like this.

Brainlest plz

5 0
2 years ago
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