Please help me answer these questions!

Question

1: When a number is decreased by 30% of​ itself, the result is 14. What is the​ number?

2: One number exceeds another by 9. The sum of the numbers is 63. What are the​ numbers?

3:A new car worth ​$30,000 is depreciating in value by ​$3,000 per year. Complete parts a. through b. below.

Write a formula that models the​ car's value,​ y, in​ dollars, after x years.

y=

4: After a 70% ​reduction, you purchase a new washing machine on sale for ​$210. What was the original price of the washing machine​?

5: A rectangular athletic field is twice as long as it is wide. If the perimeter of the athletic field is 96 ​yards, what are its​ dimensions?

6: Solve the formula for the specified variable. v= kz for k

7: Solve the formula for the specified variable. K=mc^2 for m

8: 10​% of what number is 97​?

Answer 1

1. The number is 20
2. 36 & 27
3. y = 30000 - 3000x
4. $700
5. 32L by 16W
6. k = v/z
7. m = k/c^2
8. 970