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3 years ago

Round 51.78 to the greatest number.

Mathematics

2 answers:

soldier1979 [14.2K]3 years ago

6 0

Answer:

Step-by-step explanation:

allochka39001 [22]3 years ago

5 0

Answer:

it's 52.

Step-by-step explanation:

here is why:

If the number you are rounding is followed by 5, 6, 7, 8, or 9, round the number up.

If the number you are rounding is followed by 0, 1, 2, 3, or 4, round the number down.

i hope this helps. :)

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Ana bikes for 5.5 hours. She covers a distance of 57.75 mi. Assuming she bikes at a constant speed, how fast was Ana biking?

Doss [256]

The answer is D. because if you do 57.75 divided by 5.5 you get 10.5 mi/h

hope this helps :)

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4 years ago

Read 2 more answers

Which expression correctly represents "eight times the difference of four and a number"?

il63 [147K]

Answer:

8(4-x)

Step-by-step explanation:

You're multiplying the difference of four and a number (4-x) by eight (8). So writing as an expression would look like 8(4-x).

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3 years ago

If John has 4 apples and Kamira has 3, then Mahiya gives Kamira 6 more apples and Jayla gives John 10 more apples, how many do t

Vaselesa [24]

Answer:

Kamira has 9 apples and John has 14 apples

Step-by-step explanation:

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3 years ago

Find the rectangular coordinates of the point ( -3, 1/2 π)

alexdok [17]

Answer:

$x = -3 cos (\frac{\pi}{2})= 0$

$y = -3 sin (\frac{\pi}{2})= -3$

And then the rectangular coordinates for this case are :

$(x = 0 , y = -3)$

Step-by-step explanation:

We have the following point given $P = (-3, \frac{\pi}{2})$ and we want to conver from polar to rectangular coordinates and we need to use the following formulas:

$x = r cos \theta$

$y = r sin \theta$

For this case we have that:

$r = -3$

And:

$\theta = \frac{\pi}{2}$

Replacing we got:

$x = -3 cos (\frac{\pi}{2})= 0$

$y = -3 sin (\frac{\pi}{2})= -3$

And then the rectangular coordinates for this case are :

$(x = 0 , y = -3)$

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3 years ago

10x +2y = 64

Musya8 [376]

Answer:

Step-by-step explanation:

$\left\{\begin{array}{ccc}10x+2y=64&\text{multiply both sides by 2}\\3x-4y=-36\end{array}\right\\\underline{+\left\{\begin{array}{ccc}20x+4y=128\\3x-4y=-36\end{array}\right}\qquad\text{add both sides of the equations}\\.\qquad23x=92\qquad\text{divide both sides by 2}\\.\qquad x=4\\\\\text{put the value of x to the first equation:}\\\\10(4)+2y=64\\40+2y=64\qquad\text{subtract 40 from both sides}\\2y=24\qquad\text{divide both sides by 2}\\y=12$

5 0

4 years ago