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3 years ago

What is the answer in fraction form of -2 2/5 + 3 1/4

Mathematics

2 answers:

SOVA2 [1]3 years ago

8 0

Answer:

Answer is 17

Step-by-step explanation:

-2 2/5 + 3 1/4

-12/5 +13/4

multiply both side with 20 we get

20* -12/5 +13/4 *20

-48 + 65

shusha [124]3 years ago

5 0

The answer is 17 because you multiple both sides by 20

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3 years ago

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2 years ago

Is 5 in the solution set of x+3>8

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Step-by-step explanation:

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3 years ago

Read 2 more answers

In his boat, Sheldon can travel 45 mi downstream in the same time that it takes to travel 9 mi upstream. If the rate of the curr

Nataliya [291]

Answer:

9 mph

Step-by-step explanation:

-let x be the speed of current and t be time. The speed equation for both directions can then be represented as:

$Speed=\frac{Distance}{Time}\\\\\#Upstream\\(u-6)t=9\\\\\#Donwstream\\\\(u+6)t=45$

#Since t is equal in both, we can do away with t.

#We the divide the downstream equation by the upstream equation as:

$\frac{u+6}{u-6}=\frac{45}{9}\\\\(u+6)=5(u-6)\\\\u+6=5u-30\\\\4u=36\\\\u=9$

Hence, the boat's speed in still water is 9 mph

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3 years ago