Answer:
y=3
Step-by-step explanation:
= 
= 
7-y = 4
y=3
Answer:
18
Step-by-step explanation:
If he spends half his money then washes the family car and he ends up with 18 dollars that means he spent 9 witch is half of 18 and he adds 9 more dollars which is why his allowance is 18 dollars
Answer:
15
Step-by-step explanation:
If the rate is <span>4.5%/ month
so, it is 1000 x 4.5 ) / 100 = $45
if the rate is </span><span>3.75%/ month,
so it is </span><span>1000 x 3..75 ) / 100 = $37.5
so the answer is </span>$45 - $37.5 = <span>$7.50 more </span>