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tatiyna
4 years ago
7

Which expression would be easier to simplify if you used the commutative property to change the order of the numbers?

Mathematics
1 answer:
Cerrena [4.2K]4 years ago
3 0

Answer: A. 30+(-12)+70

Step-by-step explanation:

Commutative property of addition is given by : a+b = b+a , where a and b can be any expression of real numbers.

It basically changes the order of the so that simplification of any expression becomes easier.

In A. we use this property as

30+(-12)+70 = 30+[(-12)+70]

= 30 + [70+(-12)]  [we switched order of (-12) and 17]

= 30+70-12

= 100-12

= 88

The rest of the expression already arranged accordingly, there is no need to apply commutative property to change the order of the numbers.

So the correct option is A. 30+(-12)+70.

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-5m-9/n+5 + -8m+8/n+5
iren [92.7K]

Answer:

(-13m - 1)/(n + 5).

Step-by-step explanation:

-5m-9/n+5 + -8m+8/n+5

The denominators are the same so we add the numerators:

= (-5m - 9 - 8m + 8 / (n + 5)

= (-13m - 1)/(n + 5).

3 0
3 years ago
4w-3(-5z+2w)-2z
Alekssandra [29.7K]
The answer is 13z - 18
6 0
3 years ago
Read 2 more answers
It takes 8 minutes to get around a track 2 times how many times can you do that in 24 minutes
Vladimir79 [104]

Answer

8 minutes for 2 laps,

So 8x3=24,

So 2x3=6.

You can get around the track 6 times in 24 minutes.

Step-by-step explanation:

8 0
3 years ago
Line J M is the perpendicular bisector of LK.
drek231 [11]

Answer:

The congruent segments are LN and NK ⇒ C

Step-by-step explanation:

<em>If a line is a perpendicular bisector of another line, that means this line intersects the other line in its midpoint and form right angles around this point</em>

∵ Line JM is the perpendicular bisector of line LK

→ That means JM intersect LK at the midpoint of LK

∵ Line JM intersects line LK at point N

∴ Point N is the midpoint of LK

∵ N divides LK into two segments LN and NK

∵ N is the midpoint of LK

→ That means LN equals NK

∴ LN = NK

∴ The congruent segments are LN and NK

5 0
3 years ago
The frame is a rectangle that’s 16 inches by 20 inches. The craft store has 7 feet of orange ribbon. Is that enough ribbon for L
Nutka1998 [239]
Hi!

Imagine a rectangle with a width of 20 inches, and a height of 16. Find the length around the rectangle (the perimeter).

16+20+16+20=72

There are 12 inches in a feet. How many feet are in 72 inches?

72/12=6

Lana needs 6 feet of ribbon. She bought 7 feet.

7-6=1

It is enough ribbon.
1 foot will be leftover.

Hope this helps! :)
-Peredhel
5 0
3 years ago
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