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Montano1993 [528]
3 years ago
9

A plane travels 395000 meters in 9000 seconds , what is the speed?

Mathematics
2 answers:
Ira Lisetskai [31]3 years ago
8 0

Answer:

Speed= distance/time

395000/9000= 43.9m/s

77julia77 [94]3 years ago
3 0
43 8/9 meters per second
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Which of the following is an extraneous solution of sqrt 4x + 41 = x+5
stiv31 [10]

Answer:

x=-8

Step-by-step explanation:

\sqrt{4x+41}=x+5

on squaring both sides

4x+41=(x+5)^2\\\\4x+41=x^2+10x+25\\\\x^2+6x-16=0\\\\x^2+8x-2x-16=0\\\\x(x+8)-2(x+8)=0\\\\(x-2)(x+8)=0

either x-2=0  or  x+8=0

either x=2 or x=-8

Putting x=2 in original equation, we get

\sqrt{4\times 2+41}=2+5

7=7 hence, it is not an extraneous solution

Putting x=-8 in original equation

\sqrt{4\times (-8)+41}=-8+5

i.e. 3=-3

Hence, x=-8 is an extraneous solution (since it doesn't satisfy the original equation)

3 0
3 years ago
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In the diagram, FG=34, GH=288, and HJ=256. Is GH tangent to circle F?
Anastaziya [24]

Answer:

No

Step-by-step explanation:

If GH is tangent to circle F, then it forms a right angle with FG.  Therefore, triangle FGH would be a right triangle and would satisfy Pythagorean theorem.

34² + 256² = 288²

66692 = 82944

The sides are not a Pythagorean triple, so GH is not tangent to the circle.

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3 years ago
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Lateral is 13.8cm
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A
kozerog [31]

Answer:

Y E S : )

Step-by-step explanation:

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How to solve a log equation with variable in the exponent?
GREYUIT [131]
Example...

4^x = 16
log(4^x) = log(16)
x*log(4) = log(16)
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