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Lostsunrise [7]
3 years ago
8

Please Help!

Mathematics
1 answer:
Licemer1 [7]3 years ago
5 0
She can go 240 miles
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Justin started eating lunch at 12:23 and finish at 12:45. How many elapse time while he was eating lunch
lyudmila [28]

Answer:

the answer is 22 minutes

Step-by-step explanation:

because when you need to add 2 to get 12:25 and then u add 20 more minutes which then gives takes u to 12:45 then add the time u added and that is the answer, 22 minutes

3 0
3 years ago
Read 2 more answers
Two planes left simultaneously from the same airport and headed in the same direction towards another airport 3600 km away. The
ExtremeBDS [4]

Answer:

  • 800 kph
  • 600 kph

Step-by-step explanation:

<u>Equation</u>

Let s represent the speed of the faster plane. Then its travel time is ...

  time = distance/speed = 3600/s

travel time for the slower plane is ...

  time = distance/speed = 3600/(s -200)

The difference in these times is 1.5 hours, so we have ...

  3600/(s -200) -3600/s = 1.5

<u>Solution</u>

Multiplying by (2/3)s(s -200), we get ...

  2400(s) -2400(s -200) = s(s -200)

  s^2 -200s -480000 = 0 . . . . . . . . . . rewrite in standard form

  (s -800)(s +600) = 0 . . . . . . . . . . . . . factor

The positive value of s that makes a factor zero is s = 800.

<u>Conclusion</u>

The speed of the faster plane was 800 km/h; of the slower plane, 600 km/h.

_____

<em>Check</em>

The travel time for the faster plane was 3600/800 = 4.5 hours. For the slower plane, 3600/600 = 6 hours, a difference of 1.5 hours.

6 0
3 years ago
Solve the system of equations -x+ 2y = –11 and 5x – 8y = 39 by<br> combining the equations.
Alchen [17]

Answer:

x=-5, y=-8. (-5, -8).

Step-by-step explanation:

-x+2y=-11

5x-8y=39

---------------

5(-x+2y)=5(-11)

5x-8y=39

---------------------

-5x+10y=-55

5x-8y=39

--------------------

2y=-16

y=-16/2

y=-8

-x+2(-8)=-11

-x-16=-11

-x=-11+16

-x=5

x=-5

3 0
2 years ago
Find last year's salary, if after a 4% pay raise, this year's salary is $34,320
Oksana_A [137]
34320*100/104 = 
$33,000


4 0
3 years ago
1) Convert fractions into decimals. <br><br>a.34/100<br><br><br>​
Natali5045456 [20]

Answer:

0.34

Step-by-step explanation:

a.

34 / 100 = 0.34

0.34 is the decimal form of the fraction 34 / 100.

8 0
2 years ago
Read 2 more answers
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