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harkovskaia [24]

3 years ago

11

Morse code is a way to transmit text using a series of dots or dashes The Morse code for "ADD" is shown What fraction of the sha

pes are dots in the Morse code for ADD

2 answers:

salantis [7]3 years ago

5 0

5 shapes are dots because ADD on Morse code is •- -•• -••

liberstina [14]3 years ago

5 0

Answer:

-. -.. -..

A = -.

D = -..

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Are 27.4 ones the same as 274 tenths

nadezda [96]

Yes. You can find that out by multiplying .1 by 274. It equals 27.4.

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3 years ago

Sebastian swam laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In th

lord [1]

Answer:

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Step-by-step explanation:

Please consider the complete question.

Sebastian swan laps every day in the community swimming pool. He swam 45 minutes each day, 5 days each week, for 12 weeks. In that time, he swam 1800 laps. What was his average rate in laps per hour?

Let us convert time taken into hours as:

$\text{Days}=5\times 12=60$

$\text{Minutes}=60\times 45$

1 hour = 60 minutes. To convert minutes into hours, we will divide total minutes by 60.

$\text{Hours}=\frac{60\times 45}{60}=45$

Now, we will divide 1800 by 45 to find average rate in laps per hour as:

$\text{Average rate}=\frac{\text{1800 laps}}{\text{45 hours}}$

$\text{Average rate}=\frac{\text{40 laps}}{\text{ hour}}$

Therefore, Sebastian's average rate is 40 laps per hour.

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2 years ago

A 2,000-foot-long fence will be used to enclose a rectangular field that is three times as long as it is wide. What is the lengt

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3 years ago

If 2a+3b=12 and ab=6 find the value of 8a^3+27b^3

Alex17521 [72]

<span>A) 2a + 3b = 12
B) ab = 6 solving for a
B) a = 6 / b then we substitute this into equation A)
</span><span>A) 12 / b + 3b = 12 </span><span>multiplying this by "b"
A) 12 + 3b^2 = 12b
A) 3b^2 -12b +12= 0 dividing by "3"
A) b^2 -4b + 4 = 0
Factoring
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Since b = 2 then a = 3

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<span>8a^3 +27b^3 </span>
8*3*3*3 + 27*2*2*2
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