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malfutka [58]
3 years ago
13

Two trains leave stations 228 miles apart at the same time and travel toward each other. One train travels at 105 miles per hour

while the other travels at 85
miles per hour. How long will it take for the two trains to meet?
Do not do any rounding.
Mathematics
1 answer:
Anastaziya [24]3 years ago
3 0

Answer:

in 20 kilometers round they will meet

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I’m the parallelogram above, what is the value of x+y <br><br> Help please
olga2289 [7]

Answer:

248°

Step-by-step explanation:

y = 180°- 56°

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x = 124° because opposite angles of a parallelogram are equal

x + y = 124° + 124°

        = 248°

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Given that f(x) = 19x2 + 152, solve the equation f(x) = 0
telo118 [61]

<em><u>Option A</u></em>

<em><u>The solution is:</u></em>

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<em><u>Solution:</u></em>

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We have to solve the equation f(x) = 0

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\mathrm{Subtract\:}152\mathrm{\:from\:both\:sides}\\\\19x^2+152-152=0-152\\\\Simplify\ the\ above\ equation\\\\19x^2 = -152\\\\\mathrm{Divide\:both\:sides\:by\:}19\\\\\frac{19x^2}{19} = \frac{-152}{19}\\\\x^2 = -8

Take square root on both sides

x =  \pm \sqrt{-8}\\\\x = \pm \sqrt{-1}\sqrt{8}\\\\\mathrm{Apply\:imaginary\:number\:rule}:\quad \sqrt{-1}=i\\\\x = \pm i\sqrt{8}\\\\x = \pm i \sqrt{2 \times 2 \times 2}\\\\x = \pm 2i\sqrt{2}

Thus the solution is found

5 0
3 years ago
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