What is the answers to number 27
1 answer:
The speed of plane 1 will be 300 miles/sec and that of plane 2 will be 600 miles/sec.
We have two planes flying in opposite directions to each other.
We have to determine how fast was the each plane flying.
<h3>What is the formula to calculate the distance covered by the object moving with speed - x m/s in time - t s ?</h3>The formula to calculate the distance travelled will be -
distance = speed x time = (t) meters
According to the question -
Let us assume that the speed of plane 1 = v miles/sec.
Then, the speed of plane 2 will be = 2v miles/sec.
Distance covered by plane 1 in 3 hours will be = 3v miles.
Distance covered by plane 2 in 3 hours will be = 3 x (2v) miles = 6v miles.
Since they are 2700 miles apart after three hours, therefore -
3v + 6v = 2700
9v = 2700
v = 300 miles/sec
Hence, the speed of plane 1 will be 300 miles/sec and that of plane 2 will be = 2v = 2 x 300 = 600 miles/sec.
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Answer:
C
Step-by-step explanation:
The picture is a bit blurry, but from what i can see, i'd say C (whichever one has -4 x 3 x 1 under the square root.)
So for this, you need to know the quadratic formula, which is:
<em>*ignore the weird capital A, it keeps coming up when i try to use the ± symbol</em>
They have given you the equation of a quadratic, so the first thing you have to do is rearrange it, so that comes first.
<u>So now we have the equation: 3</u><u> - 2x +1</u>
*the quadratic formula uses a, b and c, but they are specific. a is always the coefficient of , b is always the coefficient of x and c is always the constant (number without an x)
<u>So, i can find that, in this case:</u>
a = 3 b= -2 c=1
<u>Now substitute each of those values it into the original quadratic equation:</u>
<u />
<em>*again, ignore the weird capital A. </em>
That's how you find the answer, which from what i can tell in the picture is C.
Hope that helped : )