Webassign how to enter interval notation

1 answer:

6 0

The interval notation is used to report domains and ranges. It uses brackets and parentheses. Brackets are used if the solution includes the point on the curve. In other words, this is used when the inequality has the ≤ or ≥ symbol. Parentheses are used if the inequality symbols are just < or >. It means that the solution does not include the points on the curve, but on the data points that are greater or lower. For example, if the domain is 2<x≤8, the inerval is written as: (2,8].

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D = {5; 7; 9; 11}
y = 45 - 3x
substitute the values of x from the domain to the equation:

for x = 5: y = 45 - 3 · 5 = 45 - 15 = 30for x = 7: y = 45 - 3 · 7 = 45 - 21 = 24for x = 9: y = 45 - 3 · 9 = 45 - 27 = 18for x = 11: y = 45 - 3 · 11 = 45 - 33 = 12
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Answer:

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Step-by-step explanation:

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Answer:

There's a picture pf ratio tables below if you would like to view that.

Step-by-step explanation:

Let me explain this table to you. So in the first part. 1 group has 5 apples in it. Second group has ten. If you look the pattern you can tell that the groups are always multiplied by 5. 1 x 5 equals to 5. 2 x 5 equals 10. 4 x 5 equals 20 and so on. at the very end it's 135 times 5 equals 160. So there ya go for the ratio tables. I really hope this helps you. (times 5 is the ratio)

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