<u>Answer:</u>
1.
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2. 
3. 
4. 
<u>Step-by-step explanation:</u>
1.
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:

2.
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3.
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4.
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If a set covers a range of points, including those between isolated points and can not be written as a list, it is called continuous set. Continuous set are not restricted to defined separate values, they can occupy any value over a continuous range.
Answer:
1+2=3
Step-by-step explanation:
15/8. Tangent = opposite / adjacent line
-15x - 3y = 3
-15x - 3(5x-1) = 3 [input y]
-15x - 15x - 3 = 3 [distribute 3 over 5x and -1]
-30x - 3 = 3 [combine like terms]
-30x = 6 [add 3 to eliminate the negative]
x =

[divide by -30 to get x alone]
x =

[reduce the fraction]
Hopefully this is helpful enough to get you to your answer