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frosja888 [35]
2 years ago
6

I need help NOW !!!!!!!!

Mathematics
1 answer:
Montano1993 [528]2 years ago
3 0

Answer:

x=1~ \text{and}~ x = -6~ \text{but}~ -6 ~\text{is extraneous.}

Step by step explanation:

2-x  = 3-\sqrt{7-3x}\\\\\implies  \sqrt{7-3x} = 3-2+x\\\\\implies \sqrt{7-3x} = 1+x\\\\\implies 7-3x = (1+x)^2\\\\\implies 7-3x=1+2x+x^2\\\\\implies x^2+3x+2x+1-7=0\\\\\implies x^2+5x -6 =0\\\\\implies x^2+ 6x-x -6=0\\\\\implies x(x+6)-(x+6)=0\\\\\implies (x-1)(x+6)=0\\\\\implies x =1~~, x = -6

x=-6~ \text{Doesn't satisfy  the original equation, so it is  an extraneous solution.}

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Select the two values of x that are roots of this equation.<br> 2x-5=-3x^2
lakkis [162]

Answer:

A & D

Step-by-step explanation:

=> 3x²+2x-5 = 0

=> <em><u>Using Mid-term Break Formula</u></em>

=> 3x²-3x+5x-5 = 0

=> 3x(x-1)+5(x-1) = 0

=> (3x+5)(x-1) = 0

<u><em>Either,</em></u>

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3 years ago
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Oksana_A [137]

solution: Mr. Schwartz will need to order more wheels after building 12 cars.

explanation:

Mr. Schwartz begins with total number of wheels = 85

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then, if he builds 12 cars then he needs 12×4 = 48 wheels

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igomit [66]

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