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1 year ago

Which postulate proves these two

Mathematics

1 answer:

jeka57 [31]1 year ago

8 0

Answer:

SAS

Step-by-step explanation:

According to the figure...

AB=CD. (side) (given)

AC=AC (side) (common)

angle B= angle D (angle) (given)

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Pump 1 can empty a pool in 8 hours while Pump 2 can empty the same pool in 9 hours. If the two pumps worked together, how long w

yan [13]

Rate of pump A: 1/8 of a pool per hour
Rate of pump B: 1/9 of a pool per hour
Combined rate: 1/8+1/9 = 17/72 +1/9 = 25/72

So if they work together, the two pumps have a combined rate of 25/72 of a pool per hour (i.e in one hour, the two pumps will empty 25/72 of the pool)

But we want to empty ONE pool (not 25/72 of one). So we need to multiply 25/72 by some number x to get 1.

Now solve for x
x=2.88
It will take the two pumps 2.88 hours to empty the pool.
2 hours 52 minutes 50 seconds

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2 years ago

A rowing team rowed 90 miles while going with the current in the same amount of time as it took to row 10 miles going against th

SVETLANKA909090 [29]

Answer:

5mph

Step-by-step explanation:

Let speed of boat in still water is s.

Distance proportional to speed

90/10 = (s+ 4)/(s - 4)

=> 9s - 36 = s + 4

=> 8s = 40

=> s= 5 mph

:-)

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1 year ago

Which inequality matches the graph?

Alik [6]

b is the answer because it hits positive two on the x axis and -3 on the y axis

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2 years ago

I just failed algebra for the third time someone help pls Just tell me what to do

Nikolay [14]

Answer:

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Step-by-step explanation:

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2 years ago

What is the absolute value of 3 above par

lubasha [3.4K]

The absolute value of 3 above par means any value more than the absolute value of 3. The absolute value of 3 is (+) 3 since an absolute value of a number cannot be negative. Above par means positive (+), so more than the specified value of 3.

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2 years ago

Read 2 more answers