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4 years ago

(3^2 + 9x + 6) − (8^2 + 3x − 10) + (2x + 4)(3x − 7)

Mathematics

1 answer:

inna [77]4 years ago

3 0

(12+9x) - (6+3x) + 6x + -3
6+3x + 6x+-3
3+ 9x

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Jenny drove her tractor down a row of her cornfield. She drove at constant velocity of 34metersperminute down the row. The row w

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Answer:

5 mins

Step-by-step explanation:

680/4

=170 meters (quarter of 680m)

170/34

=5 mins

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Karl set out to Alaska on his truck.

tester [92]

Answer:

<u>The track consumes ≅ 61 liters of fuel every 100 kilometres</u>

Step-by-step explanation:

As we can see in the graph, the total distance that the truck can travel with 500 liters of fuel is ≅ 825 kilometres.

For answering the question properly, we use the Rule of Three Simple, this way:

Kilometres Liters of fuel

825 500

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825 * x = 500 * 100

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3 years ago

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While on a road trip, Steve drove 300 miles in 5 hours. After stopping for gas, he drove an additional 120 miles in 2 hours. Doe

bija089 [108]

Answer:

The given situation is in direct variation.

The dependent variable is the distance covered and the independent variable is the number of hours.

Step-by-step explanation:

We are given the following information in the question:

Steve drove 300 miles in 5 hours.

After stopping for gas, he drove an additional 120 miles in 2 hours.

We calculate the ratios and if these ratios are equal then, we can say that the situation represent a direct variation.

For direct variation, the equation is of the form y = kx that is , we can write,

$\displaystyle\frac{y}{x} = k$

To check the ratio:

$\displaystyle\frac{300}{5} = \frac{300+120}{5+2} =\frac{420}{7} = 60$

Thus, the given situation is in direct variation.

The dependent variable is the distance covered and the independent variable is the number of hours.

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3 years ago