So
y=-10x-29 and y=-59
substitute the y in the equation for -59:
-59=-10x-29
add 29 on both sides
-30=-10x
divide both sides by -10
3=x
so,
x=3
Let w= number of weeks
400-40w<= 160
btw <= means less than or equal too
The answer is B sorry i was wrong