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pashok25 [27]
3 years ago
15

Rewrite in simplest terms: 8r – 4(7r – 5)

Mathematics
1 answer:
SashulF [63]3 years ago
5 0

Answer:

-20(r-1)

o

-20r+ 20

Step-by-step explanation:

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The resting heart rates for a sample of individuals are normally distributed with a mean of 70 and a standard deviation of 15. U
Liono4ka [1.6K]

Answer:

84%

Step-by-step explanation:

The empirical rule states that 68% values are within 1 standard deviation of mean, i.e,

70

±

15

or from 55 to 85. Since normal distribution is symmetric, we must have (32%) outside this range, and 32/2=16% on the right if this range. Hence below 85 we have (100-16) % = 84%

7 0
3 years ago
Choose a method you prefer to solve for a system of linear equations.<br> 2x + 4y = -4<br> 2x-y=6
Artyom0805 [142]

Answer:

Elimination

x = 2

y = -2

Step-by-step explanation:

Elimination

2x + 4y = -4

2x - y = 6

Subtract the second equation from the first

5y = -10

Divide both sides by 5

y = -2

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

Substitute for y = -2 in the second equation

2x - -2 = 6

2x + 2 = 6

subtract 2 from both sides

2x = 4

Divide both sides by 2

x = 2

7 0
3 years ago
What is the slope line ?
Drupady [299]

Answer:

m = 1/2

Step-by-step explanation:

8 0
3 years ago
Read 2 more answers
Which of these polynomials will make the following equation true<br><br>​
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Poop I think good luck but it’s b x2-
512
4 0
3 years ago
49 POINTS!!!!!!!!
belka [17]
The answer is II and III, which is the last choice from above.  This is because the symbol "less than (or equal to)" indicated a conjunction, which means we have to take into account that the absolute value can be less than or equal to 15, and greater than or equal to -15.  This solution set falls in between the two values, hence, the conjunction.
3 0
3 years ago
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