Select all expressions that are equivalent to 5n-30

Mathematics

1 answer:

mamaluj [8]3 years ago

8 0

Answer: everything EXCEPT 5(n-30)

Step-by-step explanation:

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Please show me the step on how to do this. I know the answer but how do you get it.

kozerog [31]

So, to find the volume of just the cement part, you need to find the volume of the whole shape, then find the volume of the garden. then subtract them to find the volume of just the cement sidewalk.

volume of garden: 16 x 6 x 1 (l x w x h)= 96 ft3

volume of whole: length=16+4+4=24, width=6+4+4=14, height=1
you have to add 4 to each sides of the length and width to get the entire length.
volume of whole=24 x 14 x 1=336 ft3

now subt.

336-90=246 ft3 would be the volume of the cement walkway.

5 0

4 years ago

Perform the operations.<br> -3.1 + (-7.2) + 4.8

padilas [110]

Answer:

-5.5

Step-by-step explanation:

1. -3.1 + (-7.2) + 4.8

remove parentheses

add/subtract the numbers.

-3.1-7.2+4.8 = -5.5

4 0

3 years ago

Clara created the poster shown below:

lana66690 [7]

Answer:

$length=4\ cm\\width=6\ cm$

Step-by-step explanation:

Given the rectangular poster shown in the picture, you know that its dimensions (its width and its lenght) are:

$w_1=24\ cm\\l_1=16\ cm$

In order to calculate the dimensions of the rectangular at $\frac{1}{4}$ times its current size, you need to multiply the original lenght by $\frac{1}{4}$ and multiply the original width by $\frac{1}{4}$ .