4 years ago

Need help, my teacher is not great at explaining.

Mathematics

1 answer:

satela [25.4K]4 years ago

3 0

I cant really see the words

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Bone-shaped treats are 5 for $3.50 at Shelley’s store and Sarah wants to buy 12. She set up and solved this proportion to find h

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Answer:

Sarah multiplied the denominator by the denominator and the numerator by the numerator instead of finding the cross products. The equation should be 5x = 42, so the cost should be $8.40.

Step-by-step explanation:

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3 years ago

The temperature was -2F. Dropped 9F. What is the temperature after it dropped 9F

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-11 degrees F I hope this helps

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BARSIC [14]

Answer: A

Step-by-step explanation:

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3 years ago

What are the potential solutions to the equation 2ln(x+3)=0

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$2\ln(x+3)=0\implies \ln(x+3)^2=0\implies e^{\ln(x+3)^2}=e^0\implies (x+3)^2=1$

Expanding the left side gives

$x^2+6x+9=1\implies x^2+6x+8=0\implies (x+4)(x+2)=0$

which gives two solutions, $x=-4$ and $x=-2$ . But if $x=-4$ , then $\ln(x+3)=\ln(-1)$ , but this number isn't real, so $x=-4$ is an extraneous solution. Meanwhile if $x=-2$ , you get $\ln(-2+3)=\ln1=0$ , so this solution is correct.

"Potential solutions" might refer to both possibilities, but there is only one actual (real) solution.

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HELP

TiliK225 [7]

I think it’s B I’m not sure about it but I hate wan I gat it wrong.

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3 years ago