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3 years ago

Brad is putting an eight foot diameter circular garden

Mathematics

1 answer:

Debora [2.8K]3 years ago

6 0

Answer:

Step-by-step explanation:

The Formula for finding the circumference is C = πd

C = π(8)

Brad will need 25.13 feet of plastic edging to complete his garden.

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311 students went on a field trip. Six buses were

kow [346]

Answer:

50.6

Step-by-step explanation:

it says 7 students traveled by car so you need to take 7 from 311, then divide your answer (304) by 6, which is 50.6

5 0

3 years ago

Read 2 more answers

What is 3x?

MissTica

Answer: 3 · 30= 90

Step-by-step explanation:

yes you are correct

6 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

3 years ago

Fifty three less than twuce a number is 31 what is the number

BartSMP [9]

Answer:

Step-by-step explanation:

So if the result of it is 31,

And it is 53 less you would add back 53

53 + 31 = 84

And it is twice a number so you divide by 2 (opposite of twice a number)

84/2 = 42

5 0

3 years ago

Please help<br> y=-3x + 5 if y>-1

xenn [34]

Answer:

y = -3x +5. if y>-1

Step-by-step explanation:

-1 < -3x + 5

-6 < -3x

x < 2

4 0

3 years ago