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Anna [14]
3 years ago
12

Is the square root of 21 is an irratoinal number true or false explain

Mathematics
1 answer:
MrRa [10]3 years ago
3 0

Yes it is because it has no square factors.

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The vertices of figure BCDE have coordinates B(4, 4) , C(−4, 4), D(−4, −4) , and E(4, −4) . The vertices of figure B'C'D'E' have
Vedmedyk [2.9K]
<span>a translation 2 units left and 2 units up</span>
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3 years ago
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Lydia drives from city a to city b to transport goods. her return speed is 3 times her departure speed and she takes 40 minutes
gizmo_the_mogwai [7]

Answer:

1 hour

Step-by-step explanation:

Hello, let's say that her departure trip takes t in minutes, as her return speed is 3 times her departure speed, she took t/3 for the return and we know that this 40 minutes less, so we can write.

t/3=t-40

We can multiply by 3

t = 3t -40*3 = 3t - 120

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So this is 60 minutes = 1 hour.

Thank you.

4 0
2 years ago
A man ordered 4 times as many boxes of ballpoint pens as boxes of felt-tip pens. Ballpoint pens cost $4.41 per box, and felt-tip
natka813 [3]

Answer:

3

Step-by-step explanation:

Let x = # of boxes of felt-tip pens.

(x)(3.44)+(4x)(4.41) = 63.24

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x = 3

Because x = 3, the man bought 3 boxes of felt-tip pens and 12 boxes of ballpoint pens.

6 0
1 year ago
Can someone explain how I do this?
lorasvet [3.4K]

Answer:

oh soooooooooooooooo sorry

Step-by-step explanation:

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8 0
2 years ago
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ANYONE GOOD IN MATH TRANSLATIONS??​
Bumek [7]

Answer:

(x, y ) → (x + 2, y - 4 )

Step-by-step explanation:

Compare the coordinates of 2 corresponding points in the original and the image, that is

B(- 5, 4 ) → B'(- 3, 0 )

To translate from B → B'

We require a shift of 2 units right in the x direction and 4 units down in the y direction, that is

(x, y ) → (x + 2, y - 4 ) ← translation rule

3 0
3 years ago
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