3 years ago

How many tens equal 7000 ones ?

Mathematics

1 answer:

serg [7]3 years ago

8 0

My answer was wrong, I'm am very sorry

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C=5/9(F-32) If it's 32 degrees f how do I find the corresponding temperature in Celsius?

Sveta_85 [38]

C = 5/9(F - 32)....when F = 32...so sub in 32 for F
C = 5/9(32 - 32)
C = 5/9(0)
C = 0

so at 32 F, it is 0 C

8 0

3 years ago

Alan wears his coat when the temp is colder than -4.c

denis23 [38]

Answer:

T<-4.c

Step-by-step explanation:

If it’s “less than” then the stated number is the highest number that you can have

4 0

3 years ago

Rewrite decimal as a fraction 7\9

ad-work [718]

7/9 is .77 repeating

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4 years ago

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What is the area of the triangle?

irinina [24]

The area would be 12

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3 years ago

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A motorboat travels 172 km in 3 hours going upstream and 372 in 4 hours going downstream. What is the rate of the boat in still

torisob [31]

Answer:

<em>The rate of the boat is 75.17 km/h and the rate of the stream is 17.83 km/h</em>

Step-by-step explanation:

<u>System of Equations</u>

Let's call:

B = speed (rate) of the boat in still water

S = speed (rate) of the stream

The boat travels 172 km in 3 hours when going upstream, that is when the speed of the stream subtracts its own speed. The speed is the distance divided by the time, thus:

$\displaystyle B-S=\frac{172}{3}$

Multiplying by 3:

3B - 3S = 172 [1]

The boat travels 372 km in 4 hours downstream when the speed of the current adds to its own:

$\displaystyle B+S=\frac{372}{4}=93$

B + S = 93

Solving for B:

B = 93 - S [2]

Substituting in [1]

3(93 - S) - 3S = 172

Operating:

279 - 3S - 3S = 172

279 - 6S = 172

Subtracting 279:

- 6S = 172 - 279

- 6S = -107

Multiplying by -1 and solving for S:

$S = \frac{107}{6}\approx 17.83\ km/h$

From [2]:

$B = 93 - \frac{107}{6}$

$B=\frac{451}{6}\approx 75.17\ km/h$

4 0

3 years ago