Since he only makes commission on sales over $1000, he makes commission on $1500 (we find this by doing 2500-1000.) His commission is 15%, so find 15% of $1500:

So we know how makes $225 in commission.
Now we need to add this to his fixed pay to get his total pay:

So his total pay is $525, which is answer 'a'
Hope I helped, and let me know if you have any questions :)
Your answer would be 4x-7=-3(3+4x) because it only has one solution which is x= -1/8
1) First, you have to add all the 3 pieces of wood
10+7.5+12= 29.5 ft.
Second, you have to add the pieces that he has used
5.2 +6.2= 11.4 ft
Third, you have subtract the used wood from the whole wood to get how many feet he didn't use
29.5 - 11.4=18.1 ft.
I hope it helped. But, sorry don't know how to do number 2.
Answer:
2 1/2
Step-by-step explanation:
6/4=3/2=1 1/2