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galben [10]
3 years ago
14

Rob was driving his car slowly and then increased its speed by 40.5 miles per hour to reach a top speed of 60 miles per hour. Wh

at was his car's initial speed?​
Mathematics
1 answer:
Lemur [1.5K]3 years ago
4 0

Answer:

19.5

Step-by-step explanation:

60 - 40.5 = 19.5.

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What is the image of point (4, 5) after a counterclockwise rotation of 270º about the origin?
andriy [413]
A <span>counterclockwise rotation of 270º about the origin is equivalent to a </span><span>clockwise rotation of 90º about the origin.

Given a point (4, 5), the x-value, i.e. 4 and the y-value, i.e. 5 are positive, hence the point is in the 1st quadrant of the xy-plane.

A clockwise rotation of </span><span>90º about the origin of a point in the first quadrant of the xy-plane will have its image in the fourth quadrant of the xy-plane. Thus the x-value of the image remains positive but the y-value of the image changes to negative.
Also the x-value and the y-value of the original figure is interchanged.
For example, given a point (a, b) in the first quadrant of the xy-plane, </span><span>a counterclockwise rotation of 270º about the origin which is equivalent to a <span>clockwise rotation of 90º about the origin will result in an image with the coordinate of (b, -a)</span>

Therefore, a </span><span>counterclockwise rotation of 270º about the origin </span><span>of the point (4, 5) will result in an image with the coordinate of (5, -4)</span> (option C)
3 0
3 years ago
A group of cyclists went bike riding during a 7-day vacation. They biked 131 miles in the first three days. By the end of their
Nezavi [6.7K]

Answer: 156 miles

Step-by-step explanation:

Given, A group of cyclists went bike riding during a 7-day vacation.

Total distance they biked in first three days = 131 miles

Total distance they biked by the end of the vacation ( i.e. in 7 days ) = 287 miles

Then, the total distance they biked in last four days would be=

(Total distance they biked in 7 days ) - (Total distance they biked in first 3 days )

= 287 - 131 miles

= 156 miles

Hence, they biked 156 miles in last 4 days.

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3 years ago
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Nostrana [21]

Answer:

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Step-by-step explanation:

Must know what u equals to find actual answer to equation.

7 0
3 years ago
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leva [86]
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5 0
3 years ago
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Which statement correctly identifies the line of reflection?
Lemur [1.5K]

Answer: The triangles are reflected across the line y = x

Step-by-step explanation:

I used wolfram to calculate it for me. I used the bottom right point of the triangle.

8 0
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