Answer:
(2)
Step-by-step explanation:
x =
Cos 45= 12/x
x=12/Cos 45
x=
(3x-5y=60)
4x+5y=-4
3(8)-5(7.2)=60
4(8)+5(-7.2)=-4
7x=56
÷7. ÷7
x=8
3(8)-5y=60
4(8)+5y=-4
32+5y=-4
-32. -32
5y=-36
÷5. ÷5
y=7.2
