3 years ago

The function j(x) = 67x represents the number of jumping jacks j(x) you can do in x minutes. How many

Mathematics

1 answer:

Alex3 years ago

3 0

J(x)=67x
so if it was j(1)=67(1)
so j(15)=67 x 15= 1005
you can do 1005 jumping jacks in 15 minutes

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Find the area of the polygon defined by the coordinates (0, -5), (-5, 0), (-15, -20), and (-20, -15).

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This is a rectangle... Did you draw the points?

Find
- the length of the segment going from (-5,0) to (0,-5)
- and the length of the segment from (-20,-15) to (-15,-20).

These are the length and width of the rectangle; multiply both quantities.

The width is found with the formula:
$\sqrt{x_1 - x_2)^2 + (y_1 - y_2)^2} = \sqrt{((-15) - (-20))^2 + ((-20) - (-15))^2}$
The length is $\sqrt{x_1 - x_2)^2 + (y_1 - y_2)^2} = \sqrt{((-15)-(0))^2+((-20)-(-5))^2}$