Answer:
3
Step-by-step explanation:
8x + 7 = 31 Subtract 7 from both sides
<u> -7 -7</u>
8x = 24 Divide by 8
8x/8 = 24/8
x = 3
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M is the
midpoint of CD. Given
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Both ends of the
line segment to
M is equal. Definition of midpoint
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CM = 5x-2 and
MD = 3x+2. Given
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CM = MD. As above, definition
of midpoint
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5x-2 = 3x+2. Substitution
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5x-3x = 2+2
2x = 4 Rules of Algebra
x = 2
7x+3y=33 3x+y=8
X represents bottles of ketchup and Y mustard
Answer:
Step-by-step explanation:
you can start by factoring x
x(2x³-x²-18x+9)
you can group terms in parentheses strategicly
x(2x³-18x-x²+9)=x[2x(x²-9)-(x²-9)]
now we can factor x²-9
x(x²-9)(2x-1)
factor the diference of two squares x²-9=x²-3²
x(x-3)(x+3)(2x-1)
so the roots are found by using the zero product rule
x(x-3)(x+3)(2x-1)=0 will give
x=0, x-3=0 so x=3, x+3=0 so x=-3, 2x-1=0 so x=1/2
from left to right
-3, 0, 1/2, 3