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alialarma
13.01.2020 •
Mathematics
What is the solution to this system of equations? x + 2 y = 4. 2 x minus 2 y = 5.
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Ответ:
(x,y) = (5.8,-0.4)
Step-by-step explanation:
1.) x + 2y = 4.2 - 2y = 5
2.) { x + 2y =5
{ 4.2 - 2y = 5
3.) { x + 2y = 5
{ y = -0.4
4.) x + 2x ( -4.0 ) = 5
5.) x= 5.8 ( a possible solution )
6.) ( x , y ) = ( 5.8 , -0.4 ) check to the solution
7.) 5.8 + 2 x ( -0.4 ) = 4.2 - 2 x ( -0.4 ) = 5
8.) 5 =5 =5
Ответ:
they would pay a total amount of $9
Step-by-step explanation:
Scott and Tom rent a boat at Stow Lake. They start at 10:15 and end at 11:45. The number of hours for which they rented the boat would be
11:45 - 10:15 = 1 hour 30 minutes = 1.5 hours.
Converting to minutes, It becomes
60 + 30 = 90 minutes.
The boat rental costs $1.50 for every 15 minutes. Therefore, the total amount of money that they would pay is
90/15 × 1.5 = $9