3 years ago

Please help 15 points i will give u

Mathematics

1 answer:

Umnica [9.8K]3 years ago

8 0

The answer is c i think

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What is 3.5 divided by 7

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Answer:

1/2 or 0.5

Step-by-step explanation:

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True or false: a. ln56/ln7 = ln8 b. ln(x+y)-ln(x+y)=0

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a) FALSE (would be TRUE if it said LN(56)-LN(7)=LN(8))

b) TRUE (because LN(x+y)-LN(x+y)=LN[(x+y)/(x+y)]=LN(1)=0)

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What is 0.16728 divided by 3.4

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Please help Chose of the problems a or b Thank you!!

Strike441 [17]

Answer:

a. x = 13m, b. x = 12cm

Step-by-step explanation:

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x = 13 m

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When Klorina swims with the current, she swims 10 km in 2 h. Against the current, she can swim only 8 km in the same time. How f

nasty-shy [4]

Answer:

Klorina's rate in still water is 4.5 km/h

Current's rate is 0.5 km/h

Step-by-step explanation:

Let

x km/h = Klorina's rate in still water

y km/h = current's rate

With the current (current helps):

Distance = 10 km

Time = 2 hours

Rate = x + y km/h

$10=2(x+y)$

Against the current:

Distance = 8 km

Time = 2 hours

Rate = x - y km/h

$8=2(x-y)$

Divide both equations by 2:

$x+y=5\\ \\x-y=4$

Add these equations:

$x+y+x-y=5+4\\ \\2x=9\\ \\x=4.5\ km/h$

Subtract these two equations:

$(x+y)-(x-y)=5-4\\ \\x+y-x+y=1\\ \\2y=1\\ \\y=0.5\ km/h$

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3 years ago