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Zarrin [17]
3 years ago
14

(3x^3-2x^2+7)(x^3+2x) using foil method

Mathematics
1 answer:
Fantom [35]3 years ago
4 0

Answer:

x(8x-5-13x³+2x²)

Step-by-step explanation:

(3x²-5x-7x^4)-(-2x³+6x^4-5x²)

(x(3x-5-7x³))+2x³-6x^4+5x²

x(3x-5-7x³)+2x³-6x^4+5x²

x(3x-5-7x³+2x²-6x³+5x)

x(8x-5-13x³+2x²)

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Is this linear relationship a direct variation?
Talja [164]

Since the ratio of of second variable to the ratio of first variable remains constant i.e y/x =8 so, the linear relationship is direct variation.

Step-by-step explanation:

A relationship is said to have direct variation if ratio of second variable to the ratio of first variable remains constant.

A relationship is direct variation if y=kx\,\,or\,\, \frac{y}{x} =k where k is the constant.

Now checking if the given data is having direct variation or not.

x       y

3       24

4       32

5       40

6       48

Now finding y/x

if y=24 and x = 3 then y/x = 24/3 = 8

if y=32 and x = 4 then y/x =32/4=8

if y=40 and x = 5 then y/x =40/5 =8

if y=48 and x = 6 then y/x =48/6= 8

Since the ratio of of second variable to the ratio of first variable remains constant i.e y/x =8 so, the linear relationship is direct variation.

Keywords: Direct Variation

Learn more about Direct Variation at:

  • brainly.com/question/10708697
  • brainly.com/question/2495851
  • brainly.com/question/5069437

#learnwithBrainly

5 0
3 years ago
Help!! i cant figure this out :( pic attached
max2010maxim [7]
ANSWERS:
Between 7 & 8: √50, √62
Between 8 & 9: √70, √74
Between 9 & 10: √90, √83

Hope it helps u!
5 0
3 years ago
Can you please help me on this it says fully simplify using only positive exponents 5x8y7/25x4y
dangina [55]

Answer:

1/5x^12 * y^8.

Step-by-step explanation:

((5x^8*y^7/25)x^4)(y)

=1/5x^12 * y^8.

4 0
3 years ago
Can somebody please help me !!!!!!!!!47$4&
Andrews [41]

Answer:

30 celsius

Step-by-step explanation:

(86°F − 32) × 5/9 = 30°C

5 0
3 years ago
Read 2 more answers
Raul has 56 bouncy balls. He puts three times as many balls into red bags as he puts into green gift bags. If he puts the same n
Sati [7]
If we divide 56 by 4 we get 14.  Why by4?  So that one number is 3 times the other So he had 14 balls that went into the green bags and 42 (56-14) that went into the red bags.  We could just answer the question and say 14 but I think they want to know how many in each green bag.
14 and 42 don't work because they are not the same number of balls.  What number is a common factor?  7 is,
We could have 2 green bags and split the 14 balls into 2 groups of 7 and with the remaining 42 - put them into 6 red bags of 7 each.
And so the answer to your question is:
7 ball in each bag  = 2 bags are green, and 6 bags are red
                                        14 balls              +    42 balls            = 56 bouncy balls
 
6 0
3 years ago
Read 2 more answers
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