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3 years ago

8

Paul bought a soft drink and a sandwich for $9.90. What equation may be used to find the price of each item if the sandwich cost

3.5 times as much as the soft drink? A) x = 9.90 B) 2x = 9.90 C) 3.5x = 9.90 Eliminate D) 3.5x + x = 9.90

1 answer:

UNO [17]3 years ago

8 0

Answer:

D

Step-by-step explanation:

The other ones don't make sense. The answer is 3.5x+x=9.90

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Step-by-step explanation:

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so the expression becomes

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$\mathrm{For\:}f^2\left(x\right)=a\mathrm{\:the\:solutions\:are\:}f\left(x\right)=\sqrt{a},\:-\sqrt{a}$

solve

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$x=\sqrt{57}+6$

also solving

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$x-6+6=-\sqrt{57}+6$

Simplify

$x=-\sqrt{57}+6$

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