3 years ago

Please help like plz

Mathematics

1 answer:

yuradex [85]3 years ago

8 0

Answer:

B. feet

Step-by-step explanation:

You might be interested in

Find an

Mkey [24]

Counting backwards next is 1

8 0

3 years ago

Select the correct answer.

enot [183]

Answer:

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers

What is the answer to (-3x) + x

Dafna11 [192]

I'm pretty sure it's -4x.

5 0

2 years ago

−4y−4+(−3) I don't understand it if anyone want to help me understand it feel free to do so

irinina [24]

Answer:

-4y-7

Step-by-step explanation: You have to add all like terms first. So -4+-3 that is -7. Then the equation is -4y-7.

4 0

3 years ago

Two airplanes are flying in the air at the same height. Airplane A is flying east at 300mi/h and airplane B is flying north at 2

Ipatiy [6.2K]

Answer:

$\frac{dAB}{dt}=340 mil/h$

Step-by-step explanation:

The change of distance over time of the plain A is 300 mi/hour and 200 mi/hour for plane B. O is the point of the airport.

So, the distance from A to O AO = 90 miles and BO = 120 miles.

Now, we have a right triangle here. We can use the Pythagorean theorem, so the distance between the planes will be:

$AB^{2} =AO^{2}+BO^{2}$ (1)

$AB =\sqrt{AO^{2}+BO^{2}}=$

$AB =\sqrt{90^{2}+120^{2}}=150 miles$

If we take the derivative of the equation (1) we could find the change of the distance between planes.

$2AB\frac{dAB}{dt}=2AO\frac{dAO}{dt}+2BO\frac{dBO}{dt}$

$2*150\frac{dAB}{dt}=2*90*300+2*120*200=102000 mil/h$

$\frac{dAB}{dt}=\frac{102000}{150*2}$

Finally,

$\frac{dAB}{dt}=340 mil/h$

I hope it helps you!

6 0

2 years ago