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serg [7]
3 years ago
7

Write the expression 5x+2x^2-7+2x^3

Mathematics
1 answer:
avanturin [10]3 years ago
3 0

2x^3+2x^2+5x-7, That would be the answer.

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Phoebe, Andy and Polly share £270.
Stella [2.4K]
*Given
Money of Phoebe            - 3 times as much as Andy
Money of Andy                - 2 times as much as Polly
Total money of Phoebe,  - <span>£270
</span>    Andy and Polly

*Solution

Let
B - Phoebe's money
A - Andy's money
L - Polly's money

1. The money of the Phoebe, Andy, and Polly, when added together would total <span>£270. Thus, 
</span>
                  B + A + L  = <span>£270                     (EQUATION 1)

2. Phoebe has three times as much money as Andy and this is expressed as
  
                  B = 3A

3. Andy has twice as much money as Polly and this is expressed as

                  A = 2L</span>                           (EQUATION 2)
<span>
4. This means that Phoebe has ____ as much money as Polly, 

                 B = 3A
                 B = 3 x (2L)
                 B = 6L                            </span>(EQUATION 3)<span>

This step allows us to eliminate the variables B and A in EQUATION 1 by expressing the equation in terms of Polly's money only. 

5. Substituting B with 6L, and A with 2L, EQUATION 1 becomes, 

                  6L + 2L + L = </span><span>£270
</span>                                9L = <span>£270
</span>                                  L = <span>£30

So, Polly has </span><span>£30. 

6. Substituting L into EQUATIONS 2 and 3 would give us the values for Andy's money and Phoebe's money, respectively. 
</span>
                  A = 2L                           
                  A = 2(£30)
                  A = £60

Andy has £60

                  B = 6L                         
                  B = 6(£30)
                  B = £180

Phoebe has £180

Therefore, Polly's money is £30, Andy's is £60, and Phoebe's is £180.
7 0
3 years ago
A cell phone company charges $40 per month for unlimited calling, and $0.20 per text message sent. If t represents the number of
kotegsom [21]

Answer: 40 + 0.2t

Step-by-step explanation:

7 0
3 years ago
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Find the slope of the line that passes through Point A $$(​−5,7) and Point B $$(2,5), using the formula $$m=
tester [92]

Answer:

slope = - \frac{2}{7}

Step-by-step explanation:

Calculate the slope m using the slope formula

m = \frac{y_{2}-y_{1}  }{x_{2}-x_{1}  }

with (x₁, y₁ ) = (- 5, 7 ) and (x₂, y₂ ) = (2, 5 )

m = \frac{5-7}{2-(-5)} = \frac{-2}{2+5} = - \frac{2}{7}

8 0
2 years ago
Multiply. Write the product in simplest form. 6/7 × 6/11 steps and how to. and work
Triss [41]

multiply 6 x 6 to get 36 and 7 x 11 to get 77.

6/7 x 6/11 = 36/77

5 0
3 years ago
Please answer the question, I think I have the answer but I'm not sure.
Georgia [21]

Answer:

20cm

Step-by-step explanation:

Frame L&W: 25×20

PictureL&W:20×16

25-20=5

Length of Picture frame=5

Length of Picture frame=4

5×4=20cm²

To find area you multiply length by width

8 0
3 years ago
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