mrs.wright1976
New member
- Joined
- Aug 24, 2007
- Messages
- 4
1) A certain sum of money is invested at 10%. Twice that amount is invested at 8%. The total amount of interest from both investments is $91. How much is invested at 8%.
2) The sum of two numbers is 17 and the sum of their square is 145. Find the larger number
3) If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
4) The width of a rectangle is 15 feet less than its length, and the perimeter is 210 feet. Find the width
5) Three times the square of a certain positive number exceeds six times the number by nine. Find the number
6) If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ________?
7) The sum of both digits, of either of two two-digit numbers, in whatever order the digits are written, is 9. The square of either of the digits of either number, minus the product of both digits, plus the square of the other digit is the number 21. The numbers are _______?
a. 36,63 b. 81, 18 c. 27, 72 d. 45, 54 e. none
Please show your work!
2) The sum of two numbers is 17 and the sum of their square is 145. Find the larger number
3) If 6 men can do a piece of work in 14 days, how many men are needed to do the work in 21 days?
4) The width of a rectangle is 15 feet less than its length, and the perimeter is 210 feet. Find the width
5) Three times the square of a certain positive number exceeds six times the number by nine. Find the number
6) If a boat goes downstream 72 miles in 3 hours and upstream 60 miles in 6 hours, the rate of the river and the rate of the boat in still water respectively are ________?
7) The sum of both digits, of either of two two-digit numbers, in whatever order the digits are written, is 9. The square of either of the digits of either number, minus the product of both digits, plus the square of the other digit is the number 21. The numbers are _______?
a. 36,63 b. 81, 18 c. 27, 72 d. 45, 54 e. none
Please show your work!