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Natalka [10]
3 years ago
14

8xy-3y^2+5x^2-7xy+12x^2-2y^2-3xy+8y^2

Mathematics
2 answers:
BabaBlast [244]3 years ago
6 0
 8xy-7xy-3xy-3y²-2y²+8y²+5x²+12x²
then simplify by combining like terms -2xy+3y²+17x²
vfiekz [6]3 years ago
5 0
Can combine like terms
remember yo an move terms around
like terms examples
x and 2x are like
3xy^2 and 4xy^2 are like
x and 2x^2 are not
3x^2y and 3xy are not


group like terms together

I like doing it in power order, highest to lowest

5x²+12x²-3y²-2y²+8y²+8xy-7xy-3xy=
(5x²+12x²)+(-3y²-2y²+8y²)+(8xy-7xy-3xy)=
(17x²)+(-3y²)+(-2xy)=
17x²-3y²-2xy
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Mary bought these art supplies: 4 paint brushes @ $1.29 each, 6 dowel rods @ $1.49 each, a jar of paste @ $1.25, and 2 canvases
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Answer:

Option (1) is correct

The amount she receives back from $40 is  $12.65

Step-by-step explanation:

Given: Mary bought the art supplies.

4 paint brushes @ $1.29 each, 6 dowel rods @ $1.49 each, a jar of paste @ $1.25, and 2 canvases @ $6.00 each.

We have to find the change she get from $40.

We first find the total cost of the art supplies.

Since, she brought 4 paint brushes @ $1.29 each,

Thus, cost of 4 paint brush is  1.29 × 4 = $5.16

Also, 6 dowel rods @ $1.49 each,

Thus, cost of 6 dowel rods is  1.49 × 6 = $8.94

Thus, cost of 1 jar of paste  is $1.25

and 2 canvases @ $6.00 each

Thus, cost of 2 canvases  is $12.00

Thus, total cost of art supplies = 5.16 + 8.94 + 1.25 + 12 =$27.35

Thus, amount she receives back from $40 is $40 - $12.35 = $12.65

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