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3 years ago

6 3/4 min = seconds?

Mathematics

2 answers:

Evgesh-ka [11]3 years ago

6 0

Answer: " 405 seconds " .

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Step-by-step explanation:

Note: 6 3/4 min = 6.75 min. ;

Note: 1 min = 60 sec

6.75 min = ? sec ? .

6.75 min * (60 sec / 1 min) = (6.75 * 60) sec = 405 sec.

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The answer is: " 405 seconds " .

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Hope this helps!

Best wishes!

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Leokris [45]3 years ago

4 0

60x6=360
360+45=405 hope this helps

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Start with Chanel’s sequence. How does a 90-degree counterclockwise rotation about the origin change the coordinates of a shape?

zmey [24]

When a shape is rotated, it must be rotated through a point.

90 degrees counterclockwise rotation negates the y-coordinates, and then swap the x and y-coordinates
Chanel is incorrect

The rule of 90 degrees counterclockwise is:

$(x,y) \to (-y,x)$

This means that:

The y-coordinate is negated
Then the y and x coordinates are swapped

However, Charlies transformation is incorrect.

This is so because, the shape was not rotated, but instead it was reflected across the x-axis.
Then, the shape was dilated

Using points L and Q

$L=(1,1)$

When L is reflected across the x-axis.

The rule is:

$(x, y) \to (x, -y)$

So, we have:

$(1, 1) \to (1, -1)$

Next, it is dilated by 2.

The rule of this is:

$(x,y) \to k(x,y)$

So, we have:

$(1,1) \to2 \times (1,-1)$

$(1,1) \to (2,-2)$

From the diagram, the coordinate of Q is:

$Q = (2,-2)$

Same as the calculated point

Hence, Chanel is incorrect