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Kruka [31]
3 years ago
12

Log 10(x + 3) – log 10(x-3) = 1

Mathematics
1 answer:
nadezda [96]3 years ago
4 0

Answer:33/9

Step-by-step explanation:

Log10(x+3)-Log10(x-3)=1

Log10((x+3)/(x-3))=1

(x+3)/(x-3)=10^1

(x+3)/(x-3)=10

Cross multiply

x+3=10(x-3)

Open brackets

x+3=10x-30

Collect like terms

10x-x=30+3

9x=33

Divide both sides by 9

9x/9=33/9

x=33/9

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If we know that Pedro bought 1 \frac{1}{4} pounds of red sand, and 5 \frac{1}{2} pounds of brown sand, and they both cost $4.60, then we just have to add the individual amounts of sand, since they cost the same.

1  \frac{1}{4} + 5  \frac{1}{2} = 6  \frac{3}{4}

So Pedro bought 6 \frac{3}{4} lbs of sand overall. Now, we just need to multiply the cost per pound by the total amount of sand he bought.

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Hope that helped =)
4 0
3 years ago
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Answer:

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Igoryamba

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x cannot equal seven, there's a mark for it in RSM menu

Step-by-step explanation:

so the answer is y = -7

6 0
1 year ago
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60% is the answer

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