Sagot :
x = nr. hrs working for a farmer;
y = nr. hrs. babysitting;
x + y <= 25;
10x + 5y >= 150
a) Solve the system => one of the solution is x =5; y = 20(babysitting)
b) 10 + 12 =22 <= 25; 10*10 + 5*12 = 160 >=150.
y = nr. hrs. babysitting;
x + y <= 25;
10x + 5y >= 150
a) Solve the system => one of the solution is x =5; y = 20(babysitting)
b) 10 + 12 =22 <= 25; 10*10 + 5*12 = 160 >=150.
you can work only as a farmer 15 hours per week
10x+5y>=150 => 10 x >= 150- 5y :5 => 2x >=30-y => 30-2x <= y
x+y<= 25 =>
y>=30-2x
y<=25-x
10x+5y>=150 => 10 x >= 150- 5y :5 => 2x >=30-y => 30-2x <= y
x+y<= 25 =>
y>=30-2x
y<=25-x