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Snezhnost [94]
2 years ago
15

Solve for x in the equation 2/5x +1/3=3/4

Mathematics
2 answers:
tino4ka555 [31]2 years ago
7 0
I hope this helps you


2/5x=3/4-1/3


2/5x=9-4/12


2/5x=5/12


x=25/24
drek231 [11]2 years ago
4 0
The answer is x=25/24 or 1 1/24. You would solve this using inverse operations.
2/5x+1/3=3/4
1) 1/3=4/12 and 3/4=9/12
2) 9/12-4/12=5/12
3) 2/5x=5/12
4) Multiply by the reciprocal.
5) 5/2*2/5x=5/12*5/2
6) x=25/24
7)25/24=1 1/24
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Answer:

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Step-by-step explanation:

We know that the height of the rocket is given by the function:

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350=-16t^2+200t

The last is a quadratic equation, which can be put in the form at^2+bt+c=0 and solved applying the formula:

t=\frac{-b+-\sqrt{b^2-4ac} }{2a}

So, let's put the equation on the form at^2+bt+c=0 adding 16t^2 and subtracting 200t to each side of the equation; the result is:

16t^2-200t+350=0

So, we note that a=16, b=-200, and c=350.

Then,

t_1=\frac{200-\sqrt{200^2-4*16*350} }{2*16}=2.10

t_2=\frac{200+\sqrt{200^2-4*16*350} }{2*16}=10.40

According to the equation, that are the times for which the height will be 350 ft; that is because the rocket is going to ascend and then to fail again to the ground.

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