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lubasha [3.4K]
3 years ago
11

A jet takes the same time to travel 2580 km with the wind as it does to travel 1800 km against the wind. If its speed, relative

to the air is 450km/hr, what is the wind speed?
Mathematics
1 answer:
Sliva [168]3 years ago
3 0

Answer: The wind speed has to at least be 1.5 kilometers per hour

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I would say just take the big number and subtract the 41??...

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it would be 39

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3 years ago
What 2 numbers add to get 2 and multiply to 4
rusak2 [61]
Factor 4
4=1 times 4
2 times 2
they don't add to 2
set up equation
x+y=2
xy=4

first equation, subtract x from both sides
y=2-x
subsitute for y
x(2-x)=4
distribute
2x-x^2=4
add x^2
2x=x^2+4
subtract 2x
0=x^2-2x+4
use quadratic formula which is
if you have ax^2+bx+c=0 then
x=\frac{ -b+/-\sqrt{b^{2}-4ac} }{2a} so

1x^2-2x+4=0
a=1
b=-2
c=4
x=\frac{ -(-2)+/-\sqrt{(-2)^{2}-4(1)(4)} }{2(1)}
x=\frac{ 2+/-\sqrt{4-16} }{2}
x=\frac{ 2+/-\sqrt{-12} }{2}
we have \sqrt{-12} and that doesn't give a real solution
therefor there are no real solutions
but if you want to solve fully
x=\frac{ 2+/-2\sqrt{-3} }{2}
i=\sqrt{-1}
x=\frac{ 2+/-2i\sqrt{3} }{2}
x=1+/-i\sqrt{3}
x=1-i\sqrt{3} or x=1+i\sqrt{3} (those are the 2 numbers)

 





6 0
3 years ago
A point is reflected in the x- axis. The reflected point is (2,1).
Evgesh-ka [11]

Answer:

A. (2,-1) b:2

Step-by-step explanation:

8 0
3 years ago
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