Answer:
11
Step-by-step explanation:
You would start by subtracting $30 from $151 which is $121.
Then you would divide this by 11 which 121÷11=11
So 11 test were bought.
ok so if this exuation is 710/25=28.4
but if the exuation is 7*10/2*5=7
<u>45</u>
2(3-2)=2
43+2=45