X+Y=8 »» X=8-Y
now we can substitute X with 8-Y in the second equation, which was X-Y=2
X-Y=2 »» (8-Y)-Y=2 »» 8-2Y=2 »» 2Y=8-2 »» Y=6/2 »» Y=3
since X=8-Y, and Y=3, so X=8-3=5
X=5 and Y=3
Current Price = $70
Percentage increase = 100% of $70 = $70
Sale Price = $70 + $70 = $140
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Answer: The sale price of the cell phone is $140.
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The degree of a polynomial is the highest power of the polynomial.
The polynomial is
The degree is given as:
The zero is given as:
Add 3 to both sides
From the question, we understand that the polynomial has a single zero.
So, the polynomial is:
Substitute 4 for n
Hence, the polynomial is
Read more about polynomials at:
brainly.com/question/11536910
Z² -<span> 6z - 27 = 0
</span>z² + 3z - 9z - 27 = 0
z(z+3) - 9(z+3) = 0
(z+3)(z-9) = 0
z + 3 = 0 or z - 9 = 0
z = -3 z = 9
Answer: z=-3 and z=9
Answer:
5
Step-by-step explanation:
A = (base x height)/2
1) multiply by 2
A x 2 = base x height
2) divide by the base
height = (A x 2)/base
h = (20 x 2)/8 = 5