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ratelena [41]
4 years ago
13

A plane flies round-trip to Philadelphia. If flies to Philadelphia at 220 miles per hour and back home with a tailwind at 280 mi

les per hour. If the total trip takes 6.5 hours, how many miles does the plane fly round-trip?
Mathematics
1 answer:
Katena32 [7]4 years ago
6 0
v=\frac{s}{t},\ where\ V-speed,\ s-distance,\ t-time\\v*t=s\\\\
 \left \{ {{v_1*t_1=s} \atop {v_2*t_2=s}} \right.\\\\t_1=6,5-t_2\\\\ \left \{ {{220(6,5-t_2)=s} \atop {280*t_2=s}} \right.  \\\\
220(6,5-t_2)=280*t_2\\
1430-220t_2=280t_2\ \ \ |Add\ 220t_2\\
1430=500t_2\ \ \ |Divide\ by\ 500\\t_2=2,86h\\\\
s=t_2*v_1\\
s=2,86*280=800,8\\
2s=1601,6miles\\\\
Plane\ flew\ 1601,6\ miles\ in\ round\ trip.
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Answer:

Step-by-step expla

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7 0
3 years ago
Please help I need help with my homework
nexus9112 [7]

Answer:

The measure of the first angle is 32° and the measure of the second angle is 49°. (h = 32° & c = 49°)

Step-by-step explanation:

For the first triangle, we know that when you add up all the angles in a triangle, you'll end up with 180°. Keeping that in mind, all you have to do to find the third angle is add up the two we already know and subtract it from 180°.

1. 58° + 90° = 148°  -->  I know that the second angle is 90° because it's a right

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Hedgehog68

4 0
3 years ago
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svetlana [45]
Hmm, so

A(t)=740t+a₀
where a₀ is initial height or the height she started at

we want to find her initial height

after 1.5 hours, she was 710 meters above sea levl
alright
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minus 1110 both sides
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4 years ago
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irakobra [83]
4 goes into 11 twice
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3 years ago
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PLEASE HELP AND BE CORRECT
Sergio [31]

(b⁷/4⁵)⁻³

= (4⁵/b⁷)³

= 4¹⁵/b²¹

Therefore answer is option b

Must click thanks and mark brainliest

3 0
3 years ago
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