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$1.00 I need these problems done ASAP (11/28/0
- From Mathematics: Algebra
- Closed, but you can still post tutorials
- Due on Nov. 28, 2008
- Asked on Nov 28, 2008 at 8:27:35PM
Q:I need these problems done ASAP (11/28/08.Can someone please help me with these problems. Thanks for any help!
1. Solve by the substitution method.
2x-3y=-10
7x+73=y
What is the solution of the system?
(Type an ordered pair. Type N if there is no solution.)
2. Solve by the substitution method.
3m+n=9
m-9n=59
What is the solution of the system?
(Type an ordered pair. Type N if there is no solution.)
3. Solve by the substitution method.
8x+4y=-32
-8x+y=42
What is the solution of the system?
(Type an ordered pair. Type N if there is no solution.)
4. Solve by the substitution method.
6x+9y=30
-6x+y=50
What is the solution of the system?
(Type an ordered pair. Type N if there is no solution.)
5. The perimeter of a rectangle is 48 m. The length is 6 m more than twice the width. Find the dimensions.
What is the length?
___________m
(Simplify your answer.)
What is the width?
____________m
(Simplify your answer.)
6. Hockey teams receive 2 points when they win and 1 when they tie. One season, a team won a championship with 57 points. They won 12 more games than they tied. How many wins and how many ties did the team have?
How many wins did the team have?
_________
How many ties did the team have?
__________
7. Solve by the elimination method.
x+3y=26
-x+7y=44
What is the solution of the system?
______________
(Type an ordered pair. Type an integer or a fraction. Type N if there is no solution. Type I if there are infinitely many solutions.)
8. Solve the system by the elimination method.
5x+2y=-7
7x-3y=19
What is the solution to the system?
______________
(Type an ordered pair. Type an integer or a fraction. Type N there is no solution. Type I if there are infinitely many solutions.)
9. Solve by the elimination method.
0.3x-0.2y=4
0.4+0.5=55/17
What is the solution of the system?
(Type an ordered pair. Type an integer or a fraction. Type N if there is no solution. Type I if there are infinitely many solutions.)
10. Solve by the elimination method.
4x-9y=10.5
7y-2x=-6.5
What is the solution of the system?
(Type an ordered pair. Type an integer or a decimal. Type N if there is no solution. Type I if there are many solutions.)
11. Solve by the elimination method.
0.05x+0.25y=66
0.15x+0.05y=72
What is the solution of the system?
(Type an ordered pair. Type an integer or a decimal. Type N if there is no solution. Type I if there are infinitely many solutions.)
12. The perimeter of a rectangle is 60 inches. The length exceeds the width by 54 inches. Find the length and the width.
The length is__________inches.
(Type an integer or a decimal.)
The width is __________inches.
(Type an integer or a decimal.)
13. The Everton College store paid $1794 for an order of 45 calculators. The store paid $10 for each scientific calculator. The others, all graphing calculators, cost the store $58 each. How many of each type of calculator was ordered?
The store ordered__________scientific calculators’ and_________graphing calculators.
14. Smookers Lumber can convert logs into either lumber or plywood. In a given day, the mill turns out three times as many units of plywood as lumber. It makes a profit of $30 on a unit of lumber and $40 on a unit of plywood. How many of each unit must be produced and sold in order to make a profit of $15600.
15. A disc jockey must play 12 commercial spots during 1 hour of a radio show. Each commercial is either 30 seconds or 60 seconds long. If the total commercial time during 1 hour is 8 min, how many 30-seconds commercial were played that hour? How many 60-second commercials?
How many 30-second commercials were played that hour?
____________
How many 60-second commercials were played that hour?
____________
16. Soybean meal is 18% protein; cornmeal is 9% protein. How many pounds of each should be mixed together in order to get 360-lb mixture that is 13% protein?
How many pounds of the cornmeal should be in the mixture?
___________pounds
How many pounds of the soybean meal should be in the mixture?
___________pounds
17. A student makes a $9.50 purchase at the bookstore with a $20 bill. The store has no bills and gives the change in quarters and fifty-cent pieces. There are 30 coins in all. How many of each kind are there?
How many quarters are there in the change?
___________
How many fifty-cent pieces are there in the change?
___________
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