-9+36
36-9
Thats about all you
can do for that one
Gino studied for 5/4 hours in all. To get this, do 3+2 for the numerator and just put 4 as the denominator. (Four just stays the same the denominator is all fours. If you want more details just put it on comments.) Now you have the answer: 5/4 hours.
The answer:
The width is 7cm
2x + y - 4 = 0.....2x + y = 4
2x - y - 4 = 0.....2x - y = 4
2x + y = 4
2x - y = 4
--------------add
4x = 8
x = 8/4
x = 2
2x + y = 4
2(2) + y = 4
4 + y = 4
y = 4 - 4
y = 0
solution is (2,0)
He would be 120 yrs old because 60 times 4 is 240 and the son is half of his age so 240 divided by 2 is 120 hope this helped