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3 years ago

Help I don’t understand this word problem

Mathematics

1 answer:

iris [78.8K]3 years ago

5 0

Answer:

Step-by-step explanation:

X=Amount of hours you drive (70mph)

Y= Amoumt of hours your friend drives (75mph)

X+Y has to be equal to or less than 10 (X+Y=or<10)

You want to drive 500 miles or more in 10 hours or less at an average speed of 70mph for you and 75mph for your friend.(70X+75Y=or<500)

So overall....

X+Y=or<10

70X+75Y=or>500

(Both X and Y can be equal to zero or greater)

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3 years ago

A pack of six cans of coffee cost 12$ . How much would 15 cans of coffee cost

Vera_Pavlovna [14]

$30 because 12/6 = 2 so 15 x 2 = 30

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3 years ago

How to describe an inequality in your own words

emmasim [6.3K]

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3 years ago

The points ????(0,0), ????(−4,1), ????(−3,5), and ????(1,4) are the vertices of parallelogram OABC Is this parallelogram a

gavmur [86]

Answer:

Yes, parallelogram OABC is a rectangle.

Step-by-step explanation:

The vertices of a parallelogram are O(0,0), A(-4,1), B(-3,5) and C(1,4).

A parallelogram is a rectangle if its any two adjacent sides are perpendicular to each other.

product of slopes of two perpendicular lines is -1.

Formula for slope is

$Slope=\dfrac{y_2-y_1}{x_2-x_1}$

Using the formula we get

$m_{OA}=\dfrac{1-0}{-4-0}=-\dfrac{1}{4}$

$m_{AB}=\dfrac{5-1}{-3-(-4)}=-\dfrac{4}{1}=4$

$m_{OA}\times m_{AB}=-\dfrac{1}{4}\times 4=-1$

It means OA is perpendicular to AB.

Since two adjacent sides are perpendicular, therefore the given parallelogram OABC is a rectangle.

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4 years ago

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timama [110]

Answer:

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3 years ago