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3 years ago

Help with this please

Mathematics

1 answer:

AysviL [449]3 years ago

6 0

A) The x-axis represents minutes used per month. The y-axis represents cost in dollars. Following the line of the graph indicating 60 minutes per month it shows Plan A costs $6 per month while Plan B costs $12 per month.

Plan A is cheaper.

Difference in prices = cost of Plan B for 60 minutes per month - cost of Plan A for 60 minutes per month

= 12 - 6 = $6 per month

b) To solve, identify where the lines of Plan A and Plan B intersect. Both lines intersect at 160 minutes per month.

Which plan costs less when less minutes are used? To solve, identify which line has a lower cost on the y-axis. Plan A costs less if less than 160 minutes are used.

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Answer:

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Step-by-step explanation:

Let O represents the base camp,

Suppose after walking 3.5 miles west, first hiker's position is A, then after going 1.5 miles north from A his final position is B,

Similarly, after walking 2 miles east, second hiker's position is C then going towards 0.5 miles south his final position is D.

By making the diagram of this situation,

Let D' is the point in the line AB,

Such that, AD' = CD

In triangle BD'D,

BD' = AB + AD' = 1.5 + 0.5 = 2 miles,

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By Pythagoras theorem,

$BD^2 = BD'^2 + DD'^2$

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Hence, the hikers are 5.9 miles apart.

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A study of one thousand teens found that the number of hours they spend on social networking sites each week is normally distrib

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Given:

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