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RUDIKE [14]
3 years ago
14

Ed is on a road trip. He has already traveled 220 miles and is driving at a rate of 61 miles per hour. Which equation could be u

sed to find how many hours, x, Ed has left in his road trip if he is traveling 677 total miles?
A. 61x + 677 = 220
B. 220x + 61 = 677
C. 61x + 220 = 677
D. 220x + 677 = 61
Mathematics
2 answers:
Sever21 [200]3 years ago
7 0

Question: Ed is on a road trip. He has already traveled 220 miles and is driving at a rate of 61 miles per hour. Which equation could be used to find how many hours, x, Ed has left in his road trip if he is traveling 677 total miles?

Answer:  61x + 220 = 677

Explanation:  you minus the amount you have done then each hour add 61 steps which would be the x for each hour

question answered by

(jacemorris04)



Lerok [7]3 years ago
3 0

Answer:

C

Step-by-step explanation:

Imagine your going 61 steps per hour and you have already walked 220 steps. You want to walk 677 steps in total. First you minus the amount you have done then each hour add 61 steps which would be the x for each hour

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The most appropriate choice for similarity of triangles will be given by -

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What are similar triangles?

Two triangles are said to be similar, if the corrosponding angles of the triangles are same and the corrosponding sides of the triangles are in the same ratio.

Here,

The diagram has been attached here

Let the distance of woman from the pole be x ft and the distance of tip of the shadow to the pole be y ft.

Height of street light = 18 ft

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The two triangles are similar [As height of woman is parallel to the height of pole]

\frac{y - x}{6}=\frac{y}{18}\\18y - 18x = 6y\\18y - 6y = 18x\\12y = 18x\\y = \frac{18}{12}x\\y = \frac{3}{2}x\\

To find the speed, we have to differentiate both sides with respect to time 't'

\frac{dy}{dt} =\frac{3}{2}\frac{dx}{dt}\\\frac{dy}{dt}=\frac{3}{2} \times 4\\\frac{dy}{dt} = 6

Speed of tip of her shadow = 6 ft

To learn more about similarity of triangles, refer to the link-

brainly.com/question/14285697

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