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adelina 88 [10]
2 years ago
14

Help please!! will give brainiest :))

Mathematics
2 answers:
jeyben [28]2 years ago
7 0

Answer:

81(x + 2y)(x - 2y)

Step-by-step explanation:

81 {x}^{2}  - 324 {y}^{2}  \\  \\  =  {(9x)}^{2}  -  {(18y)}^{2}  \\  \\  = (9x + 18y)(9x - 18y) \\  \\  = 9(x + 2y) \times 9(x - 2y) \\  \\  = 81(x + 2y)(x - 2y)

Kitty [74]2 years ago
3 0
<h2><u><em /></u></h2><h2><u><em> -98415 is the answer because im smart</em></u></h2>
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I'm stuck please i need help and it's urgent​
NNADVOKAT [17]

Answer:

x²=2x-1>>

x²-2x+1=0

x=1

y²-4 = 5x>>

y²= 5×1+4=9

y=3

x_2=z-2>>

z=x=1

4 0
3 years ago
Which property is used in the first step to solve this equation?
melomori [17]

Answer:

distributive property

Step-by-step explanation:

we know the distributive property states that the multiplication of a number (in this case, the number 4) by a sum (in this case is a subtraction:  x-6) is equal to the sum of the multiplications of that number for each of the terms that belong to the sum:

we have: 4(x-6)

we apply the distributive property, so we have

4(x-6)=4*x-4*6

4(x-6)=4x-24

7 0
3 years ago
During the national day celebrations.Asha decorates her balcony with serial lights of red,green and white colours.The red light
expeople1 [14]

If all three coloured lights blink together at 8:49 pm, they will blink together at 8:50 pm

<u>Solution:</u>

Given that the red light blinks at intervals of 4 seconds, the green at 5 seconds and the white at 6 seconds.

If all three colored lights blink together at 8:49 pm,

We have to find when will they blink together again?

First let us know, at what intervals they all together blink.

For that we have to find the lcm of 4, 5, 6.

L.C.M (4, 5, 6) = 2 x L.C.M(2, 5, 3)

As 2,3,5 are primes, we can’t take common further, so multiply all  

= 2 x 2 x 5 x 3

= 4 x 15  = 60

So, after every 60 seconds = 1 minute they will blink.

Then, after 8 : 49 pm, they will blink at 8 : 49 + 1 = 8 : 50 pm.

Hence, they all blink at 8 : 50 pm.

6 0
3 years ago
30 ounces is how many pounds
Effectus [21]

the answer is 1.875 pounds

5 0
3 years ago
Use Inverse Operations to solve.Check Your Answer<br><br> 17 + k = 54
lesya [120]
When you do the inverse operation which in this case would be subtraction you do  54-17 and then you do 17 minus 17 which leaves you with the variable 54-17=34 so k=34

8 0
3 years ago
Read 2 more answers
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