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son4ous [18]
3 years ago
6

Subtract 2x^2-6x-4

Mathematics
2 answers:
OlgaM077 [116]3 years ago
6 0

Answer:

The answer in descending powers of x:

  • -2x²+2x+7

Step-by-step explanation:

We have to subtract 2x^2-6x-4 from 4x^2-4x+3

4x^2-4x+3\:-\left(2x^2-6x-4\right)

Distribute the Negative Sign

=4x^2-4x+3+-1\left(2x^2-6x-4\right)

=4x^2+-4x+3+-1\left(2x^2\right)+-1\left(-6x\right)+\left(-1\right)\left(-4\right)

=4x^2+-4x+3+-2x^2+6x+4

Combine Like Terms

=4x^2+-4x+3+-2x^2+6x+4

=\left(4x^2+-2x^2\right)+\left(-4x+6x\right)+\left(3+4\right)

=2x^2+2x+7

Thus, the answer in descending powers of x:

  • -2x²+2x+7
agasfer [191]3 years ago
6 0

Answer:

descending powers of x:

Step-by-step explanation:

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Answer:

  • The 27th term is 22

Step-by-step explanation:

Let the first term is a and common difference is d.

<u>The nth term is:</u>

  • aₙ = a + (n - 1)d

<u>We have:</u>

  • a₆ = 15
  • a₉ = 16

<u>The difference of these terms is:</u>

  • (a + 8d) - (a + 5d) = 16 - 15
  • 3d = 1
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<u>Then the first term is:</u>

  • a + 5*1/3 = 15
  • a = 15 - 5/3 = 13 1/3

<u>The nth term equation is:</u>

  • aₙ = 13 1/3 + 1/3(n - 1) = 1/3n + 13

<u>If the nth term is 22, find n:</u>

  • 1/3n + 13 = 22
  • 1/3n = 22 - 13
  • 1/3n = 9
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3 years ago
Socks cost $5 per pair.
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Step-by-step explanation:

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Step-by-step explanation:

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Answer:

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<u>Step-by-step explanation:</u>

There are four properties of operations in math. These properties are applicable in case of addition and multipication but not in case of division and subtraction.

These properties are used to solve problems involving rational numbers as well as integers.These properties are associative,commutative, distributive and identity.

commutative property is A+B=B+A

                                  ⇒5+4=4+5

and                                A*B=B*A

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associative property ( 32+14)+7= 32+(14+7)

                                   ( 8*9)*7= 8*(9*7)

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                                    1*58=58

distributive property is 15*21

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                                    15*21

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                                  ⇒15*22-15*1

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