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USPshnik [31]
3 years ago
10

Solve this polynomial:

Mathematics
1 answer:
ivann1987 [24]3 years ago
4 0
2d^2 -2d-7

(14d^2 - 8) + (6d^2 - 2d + 1)
14d^2 - 8+ 6d^2 - 2d + 1
20d^2 - 7 - 2d
20d^2 - 2d - 7
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PLEASE PLEASE PLEASE HELP
Musya8 [376]

Answer:

The weight of large box = 13.75 kilograms

the weight of small box = 6.5 kilograms

Step-by-step explanation:

Given:

delivery of 2 large boxes and 3 small boxes has a total weight of 47 kilograms

delivery of 6 large boxes and 5 small boxes has a total weight of 115 kilograms.

Let x be the weight of large box

and y be the weight of small box

Make equation from the given information

2(weight of large box) + 3(weight of small box) = 47

2x + 3y = 47 -----------> equation 1

Do the same and make one more equation

6x + 5y = 115-----------> equation 2

Now we solve both equation using elimination method

Multiply the first equation by 3

6x + 9y = 141

6x + 5y = 115  (subtract both equations)

----------------------------------------------------

      4y = 26

divide both sides by 4

So y= 6.5

Now plug in 6.5 for y  and find out x

2x+3y = 47

2x + 3(6.5) = 47

2x + 19.5 = 47  (subtract 19.5 on both sides)

2x = 27.5

divide both sides by 2

x = 13.75

The weight of large box = 13.75 kilograms

the weight of small box = 6.5 kilograms

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3 years ago
6cm : 3cm in lowest form
Mariana [72]
If this a ratio, then the simplified form would be 2cm : 1cm I believe (6/3 = 2 and 3/3 = 1 so 2:1)
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How many solutions does y=5x+12 and y=5x+18
Mrrafil [7]

Answer:

there is no solution for these linear equations in two variables.

since a1 (y) = a2 (y)

         b1 (5x) = b2 (5x)

  but, c1 (12) not equal to c2 (18)

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Answer:

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Step-by-step explanation:

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The median rainfall during a spring storm in the lowlands is about 4 mm less than a spring storm in the highlands. The mean rain
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There is a difference because in the spring, there may be more days of rain, therefore that would increase the mean for the spring compared to the other days. 
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