9514 1404 393
Answer:
A. 2x^2 +4
B. 5x^3 -4x^2 +3x -12
C. addition and subtraction of polynomials result in polynomials (closed)
Step-by-step explanation:
A. The total of the two side lengths is ...
(3x^2 -4x -1) +(-x^2 +4x +5) = (3 -1)x^2 +(-4+4)x +(-1+5) = 2x^2 +4
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B. The length of the third side is the difference between the total for all three sides and the total for the given two sides:
(5x^3 -2x^2 +3x -8) - (2x^2 +4) = 5x^3 +(-2-2)x^2 +3x +(-8-4)
= 5x^3 -4x^2 +3x -12
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C. Addition of the two polynomials results in a polynomial. Subtraction of the two polynomials results in a polynomial. There is nothing here to indicate the set of polynomials is not closed under addition and subtraction.
Answer:
$568.75
Step-by-step explanation:
To find the markup, we multiply the original price by the percentage of markup
Markup = 175 * 225%
=175 * 2.25
=393.75
The new price is the markup plus the original price
New price = markup+ original price
=393.7+175
=568.75
Answer:
6x
Step-by-step explanation:
Since 2 sides are equal to 3x-3, multiply 3x-3 by 2.
=6x-6
Subtract 18x+6 - 6x-6
= 12x
Since 2 there are 2 sides missing, 12x divided by 2
=6x
Answer:
i need help also
Step-by-step explanation:
Ok so 4 apples and 2 oranges are $1. That means that the equation should be 4x+2y=100 (since there are 100 cents in a $1) so x would be the apples and y would be the oranges. If you solve it out the apples would be .25 each and the oranges would be .50 each
