Y intercept when x =0
<span> y=-x+3
y = -0 +3
y = 3
</span><span> the slope is -1 </span>
<span>
</span>
-3(2r+7)=3
distribute -3
-6r-21=3
add 21 to both sides, this causes the 21 on the left to cancel itself out.
-6r=24
divide each side by -6, this causes the -6 on the left side to cancel itself out.
r=-4
Answer:
Petra would need to save for 12 weeks to get 126
126+34.75=160.75