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Semmy [17]
2 years ago
12

Friend me :) comment and other people will friend too

Mathematics
1 answer:
Maurinko [17]2 years ago
6 0

Answer:

I will xD

Step-by-step explanation:

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Greg and Erin start at the same point and begin running in different directions. Greg is running east at a speed of 7 miles per
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Answer: The time at which the distance between the two is 150 miles is 1.3 hr.

Step-by-step explanation:

Step 1: Sketch the problem as shown in the attached image.

The problem can be solved using Pythagoras theorem since the sketch is a right angled triangle.

It follows the equation x² + y² = 15².

The distance covered by Greg is given by <em>x mi</em>, and that of Erin is given by <em>y mi</em>.

Step 2: To derive the distance covered by Erin and Greg, we use the formula <em>Speed = distance ÷ time.</em>

Which by cross-multiplying gives <em>distance = speed × time</em>.

Let time taken to cover the distance be <em>t h</em>.

Given that Speed of Erin is 9 mph and that of Greg is 7 mph.

Hence, distance covered by Greg, x = 7 × t = 7t.

Distance covered by Erin, y = 9 × t = 9t.

Step 3: Insert the terms x and y into the Pythagoras equation x² + y² = 15² and solve for <em>time t.</em>

(7t)² + (9t)² = 15²

49t² + 81t² = 225

(49 + 81)t² = 225

      t² = 225/(49 + 81)

      t² = 225/130

      t² = 1.730769231

       t = √1.730769231

       t = 1.315587029

t = 1.3hr

Hence the time at which the distance between the two is 150 miles is 1.3 hr.

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3 years ago
Two cars traveled equal distances in different amounts of time. Car A traveled the distance in 2 h, and Car B traveled the dista
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Answer: Car B traveled 60 mph.

Step-by-step explanation:

A= B-15

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2B - 30 = 1.5B

-1.5B +30 = -1.5B

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2(0.5B) = 2(30)

B = 60 mph

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Answer:

<h3>A and D </h3>

Step-by-step explanation:

Hope this helps

if its wrong i´m sorry i got my answer from math.way

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Write in standard form 4,000,000+3,000+50+2
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4,003,052 is the answer to the problem
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