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sineoko [7]
3 years ago
13

If a rink is 3 times its width and the width is 10m what is the area

Mathematics
1 answer:
emmainna [20.7K]3 years ago
8 0
300m because area is Length x width and it's 3x as big as 10 meters it's 30 x 10= 300
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mart [117]
Sin = 14/50; 7/25 & tan = 14/48; 7/24, Hope this helps.
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3 years ago
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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
AveGali [126]

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.

4 0
3 years ago
7 times as many as 3,073
mestny [16]

if your wondering what 7 times 3073 is then your answer is 21511. If your looking for something else I don't understand it then. Hope this helps!

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A student says that (-1, 2) is a solution of y=3x-2 Are they correct or incorrect? Why?
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Answer:

If you substitute (-1,2) meaning x and y

2=3(-1)-2

2=-3-2

2= -1

Step-by-step explanation:

he's incorrect since the solution does not equal 2 on both sides

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3 years ago
Some banks now use continuous compounding of an amount invested. In this case, the equation that models the value of an initial
Elza [17]

9514 1404 393

Answer:

  $2838.14

Step-by-step explanation:

Fill in the values and do the arithmetic.

  A = 2000e^(0.07·5)

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The value of the investment in 5 years will be $2838.14.

5 0
3 years ago
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