I think the answer is
x+3y+7
The first expression could be written as 3x + 12 and the second could be written as 2x + 6.
In order to find these, count the number of x's you see in each question. Then use that number as the coefficient to x in your statement. The first problem has 3 and the second has 2.
Then add the numbers of 1's together to get the constants at the end of the expressions. The first has 12 and the second has 6.
A table leg. It is 90 degrees from the floor. It is a right angle
A difference is the result of a subtraction.
Call the number n.
"seven times a number": 7n
"eight more than four times the number": 4n + 8
"The difference between seven times a number and eight more than four times the number": 7n - (4n + 8)
Answer: 7n - (4n + 8)
A reduction of 15% per year means 100-15=85% reducing factor.
1st year: 0.85×18000=$15300.
2nd year: 0.85×15300=$13005.
3rd year: 0.85×13005=$11054.25.
So after 3 years the value of the car is $11054.25 or $11054 to the nearest dollar.
