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1 year ago

What is -1/5 + 7/10 i keep getting 9/10 but on my hw paper the answer doesn’t match

Mathematics

1 answer:

AleksAgata [21]1 year ago

8 0

Answer:

1/2

Step-by-step explanation:

1. LCD = 10

2. $-\frac{1}{5} * \frac{2}{2} + \frac{7}{10}$

3. $-\frac{2}{10} + \frac{7}{10}$

4. $-\frac{2+7}{10}$

5. 5/10

6. Simplify : 1/2

Hope this helps!
--Blu

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3 years ago

Read 2 more answers

A trains leaves Cincinnati at 2:00 pm.A second train leaves the same station in the same direction at 4:00 pm.The second train t

kvasek [131]

Answer:

Speed of first train = 36 mph

Speed of second train = 60 mph

Step-by-step explanation:

Given:

First train leaves Cincinnati at 2:00 PM

Second train leaves same station at 4:00 PM

Speed of second train is 24 mph faster than first train.

The second train overtakes the first at 7:00 PM

To find the speeds of each train.

Solution:

First train:

Let speed of first train be = $x\ mph$

Time of travel between 2:00 PM to 7:00 PM = $7-2=5\ h$

Distance traveled by 1st train in 5 hours in miles = $Speed\times time = x\times 5 = 5x$

Second train:

Then, speed of second train will be = $(x+24)\ mph$

Time of travel between 4:00 PM to 7:00 PM = $7-4 = 3\ h$

Distance traveled by second train in 3 hours in miles = $Speed\times time = (x+24)\times 3=3x+72$

At 7:00 PM both trains meet as the second train overtakes the first. This means the distance traveled by both the trains is same at 7:00 PM as they both leave from same stations.

Thus, we have:

$5x=3x+72$