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Mathematics

1 answer:

belka [17]3 years ago

8 0

I’m not a true percent sure but I think it’s C

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B is the midpoint of segment AC. Find the value of x.

tester [92]

Answer:

x = 2

Step-by-step explanation:

Since B is the midpoint, AB and BC are congruent in length.

5x-6 = 2x

5x = 2x + 6

5x - 2x = 6

3x = 6

x = 2

3 0

3 years ago

Pump 1 can empty a pool in 9 hours while Pump 2 can empty the same pool in 12 hours. If the two pumps worked together, how long

ruslelena [56]

Answer:

About 5 hr 10 min

Step-by-step explanation:

rate 1 = 1 pool / 9 hrs rate 2 = 1 pool / 12 hours

now find the time with both rates combined

1 pool / ( 1/9 + 1/12) = 1/ (7/36) = 36/7 hr = 5 1/7 hr = 5 hr 8.6 min

8 0

2 years ago

Flying with a tailwind, a pilot flew an airplane 700 miles in 3.5 hours. flying into a headwind, the return trip took 5 hours. f

Naya [18.7K]

Velocity With the Wind = 700/3.5 = 200 mph
Velocity Against the Wind = 700/5 = 140 mph

Taking the average we get:
Airplane Velocity In Still Air = 170 mph
Wind Velocity = 30 mph

Source:
http://www.1728.org/veloccal.htm

8 0

3 years ago

Read 2 more answers

The average test score of RSM students in September increased by 10%. In October it increased by another 15%. By what percent di

irina [24]

Answer:

26.5%

Step-by-step explanation:

<u>Increasing Percentages</u>

When sequential percentages increasing are computed, each increase applies to the previous result, instead of the first quantity. That is why sometimes the final results may be confusing. For example, increasing 10% and then 15% will not be the same as increasing a total of 25%.

The average test scores of RSM students first increased by 10%. It means that some quantity C increased by

$10C/100=0.1C$