Answer:
Step-by-step explanation:
I assume you need help with the first picture:
Let 
Then

Clearly you can see that the sum of 2 rational numbers gives a rational number.
The slope of the line is -3
Answer:
32 inches
Step-by-step explanation:
Assuming 76 inches is perimeter, we'll say that w is width
Length = 5w + 2
Perimeter = w + w + (5w+2) + (5w+2) = 76 inches
12w + 4 = 76
Subtract 4 on both sides
12w = 72
Divide 12 on both sides
w = 6
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If the width is 6, then 5w + 2 = 5(6) + 2 = 30 + 2 = 32
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Width - 6 inches
Length - 32 inches
Perimeter - 76 inches
I believe the answer is 4 points. Hope this helps!
Answer:
The mean shall be 10.67 and the standard deviation shall be 6.09
Step-by-step explanation:
There are calculators online that can help u with problems like these :)