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4 years ago

I need help on all of the please help

Mathematics

1 answer:

yanalaym [24]4 years ago

7 0

7. G
8. F
9. H
10. A
ll. C
12. E
13. D
14. B
15. 3×4+0.95
16. (240+360)÷100

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Algebra help needed asap?!

Arisa [49]

$2^{25}\text{ million people on }2^{17}\text{ square miles}\\\\$

$\text{So on 1 square mile there are : }\dfrac{2^{25}}{2^{17}}=2^{25-17}=2^{12}\text{ milion people}$

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Two airplanes leave the same airport. One heads north, and the other heads east. After some time, the northbound airplane has tr

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A security fence encloses a rectangular area on one side of a park in a city. three sides of fencing are? used, since the fourth

alexandr1967 [171]

Let x = length of the park
Let y = width of the park

Because the area is 392392 ft², therefore
xy = 392392 (1)
Because three sides of fencing measure 5656 ft, therefore
2x + y = 5656 (2)
That is
y = 5656 - 2x (3)
Substitute (3) into (1).
x(5656 - 2x) = 392392
5656x - 2x² = 392392
2x² -5656x + 392392 = 0
x² - 2828x + 196196 = 0

Solve with the quadratic formula.
x = (1/2)*[2828 +/- √(2828² - 4*196196)]
= 2756.83 or 71.17

Answer:
The possible dimensions are 2756.8 ft and 71.2 ft (nearest tenth)

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3 years ago

PLEASE HELP! THANKS

My name is Ann [436]

13

Explanation: a^2 + b^2 = c^2
12^2 + 5^2 = c^2
144 + 25 = c^2
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3 years ago

Two pumps at a local water facility can only

Ratling [72]

According to the information given, the system of inequalities that models the situation is given by:

$x + y \geq 18$

$x + y \leq 24$

$120x + 200y \geq 3000$

<h3>System of inequalities:</h3>

For the system, the variables are:

x is the number of hours that Pump 1 runs.

y is the number of hours that Pump 2 runs.

They will run for at least 18 hours in a day but obviously no more than 24 hours in a day, hence:

$x + y \geq 18$

$x + y \leq 24$

Pump 1 can move 120 gallons per hour while Pump 2 can move 200 gallons per hour. In total the two pumps must move at least 3,000 gallons of water per day, hence:

$120x + 200y \geq 3000$

You can learn more about system of inequalities at brainly.com/question/14361489

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3 years ago