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Natalka [10]
3 years ago
8

Rút gọn Giúp em với ạ. em lm mãi ko ra

Mathematics
2 answers:
elena55 [62]3 years ago
5 0

Answer:

Step-by-step 12explanation:

12

anastassius [24]3 years ago
4 0

Answer:

Nhân đa thức đối xứng

(2\sqrt{3} -4)/(\sqrt{3} -1) + (2\sqrt{2} -1)/(\sqrt{2} -1) - (1+\sqrt{6} )/(\sqrt{2} +3)

=(2\sqrt{3} -4)(\sqrt{3} +1)/(\sqrt{3} -1)(\sqrt{3} +1) + (2\sqrt{2} -1)(\sqrt{2} +1)/(\sqrt{2} -1)(\sqrt{2} +1) - (1+\sqrt{6} )(\sqrt{2} -3)/(\sqrt{2} +3)(\sqrt{2} -3)

=3-\sqrt{3} -2+4+\sqrt{2} -1 +(\sqrt{2} -3+2\sqrt{3} -3\sqrt{6} )/7

= 2.900712176

Step-by-step explanation:

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The perimeter of a rectangle is 20 inches.The length is 2 inches less than twice the width.
SSSSS [86.1K]

Answer:

width = 6

length = 4

Step-by-step explanation:

perimeter = 2L + 2W

L = W - 2

plug in perimeter:

20 = 2L + 2W

you know the length is 2 less than the width

plug in (w - 2) for L:

20 = 2(w - 2) + 2w

solve for w:

20 = 2w - 4 + 2w

20 = 4w - 4

4w = 24

w = 6

now plug in 6 for w in either equation, whichever is easier to solve:

L = 6 - 2

L = 4

width = 6

length = 4

6 0
3 years ago
Combine like terms y+6-2-4y3-5y+2y3-2y3
stich3 [128]

Answer: -3y+12

Step-by-step explanation:

8 0
3 years ago
If you have a job that earns $120 in 2 days, how much would you earn in 6 days? Use a chart to show the proportion of earnings f
zepelin [54]
To figure this out, we need to use fractional proportions.

Currently, we have $120, the amount earned, and 2 days, the current rate.
Our fraction for this is: 120 / 2 = x / 6, x being the amount earned in 6 days.

Let's use a little technique to help us answer faster.

With our current money earned, 120, and our current days, 2, we can divide 120 by 2 to find out how many we earned in 1 day.

120 / 2 = 60.

We earned $60 per day.

With this formula, 60d, d being the amount of days, we can solve quicker.

We are solving for 6 days, so multiply $60 by 6 days.

60 x 6 = 360

Your proportion is : 

120/2 : 360/6

I hope this helps!
6 0
3 years ago
1.
Sonbull [250]

Answer:

SORRY I DID NOT UNDERSTAND

8 0
2 years ago
On a coordinate plane, a line goes through (negative 3, negative 3) and (negative 1, 5).
slega [8]

Answer:

y=20

x=4

Step-by-step explanation:

Since you can plug the first 2 coordinates into the slope equation (\frac{y_{2}-y_{1}}{x_{2} -x_{1} }) you will get 4 for the slope so for the equation for the parallel line you would get y=4x+4 and since the x=4 you could plug that in and you would get y=20 and x=4

5 0
3 years ago
Read 2 more answers
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