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3 years ago

MJ solved the equation -5x - 16 = 5

Mathematics

1 answer:

Andrei [34K]3 years ago

3 0

Answer:

Step-by-step explanation: He add 16 together you are not suppose to add 16 you are suppose to add 5 together so instead of 16 + 16 you do 16+ 5

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-3.1+7-7.4x=1.5x-6(x-3/2)

Ronch [10]

Answer:

1.76

Step-by-step explanation:

3.9-7.4x=-4.5x+9

-2.9x=5.1

x=1.758 or 1.76

I hope this helps, if not i'm sorry.

7 0

3 years ago

Read 2 more answers

Factor this trinomial <br> 6x^2+23x+7

zhuklara [117]

(3x + 1) (2x + 7)

Factored by grouping

3 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

How do i divide decimals by whole numbers

Vinvika [58]

You should check out Kahn academy

4 0

3 years ago

An object falls 18ft in 2 seconds. Knowing the distance varies directly with the square of the time of the fall how long does it

AVprozaik [17]

Answer:

t=4.19 seconds

Step-by-step explanation:

Distance varies directly with the square of the time of the fall

It means,

D=kt^2

18ft in 2 seconds

D=kt^2

18=k*2^2

18=4k

k=18/4

=9/2

k=9/2

D=kt^2

D=79feet

79=9/2t^2

t^2=79÷9/2

t^2=79×2/9

=158/9

t=√158/√9

t=12.57/3

t=4.19 seconds

7 0

3 years ago