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Hardcover books cost $4 each and paperback cost $2 each. A person spends $26 for 8 books. How many hardcover books did she purchase?

the meat cost $6 per pound, the potatoes cost $3 per pound, and the carrots cost $1 per pound. You spend $48.50 on 13.5 pounds of food. You buy twice as many carrots as potatoe.

things i need, equations and answers i need the asap!!!!!!!!!!

A woman invests a sum of money at 6% and 3000 more than this 9%.

a merchant mixes some candy worth $3.50 per pound with cheap stuff worth $1.00 per pound. There are 10 more pounds of cheap stuff than the more expensive candy.

Please help, I can't figure out how to set up the problem. This should be elimination but I just need help setting it up. Please, its due tomorrow and I really have to get this done, thanks a lot...

The admission fee at the fair is $1.50 for children and $4.00 for adults. On a certain day, 2200 people enter the fair and $5050 is collected. How many children and adults attended? I'm...

Solve the system with three unknowns x+y+z=-8 2x+y-z=2 x-y+z=4 Is this an empty set, does it have one solution, or many solutions? Solve this system...

3x+5y=-17 2x+4y=6 What equation did Bob have after he eliminated x?

word problem about rectangle perimeter and systems of equations by elimination.

Im conduesed

use the elimination method to solve the system

A traveler is walking on a moving walkway in an airport. The traveler must walk back on the walkway to get a bag he forgot. The traveler's ground speed against the walkway is 3ft/s and 7ft/s with...

the apple store sells ipads and Macbooks. ipods cost $200 each, and Macbooks cost $1,200 each. this year, the number of Macbooks they sold was twice the number of ipods they sold. their total sales...

Admissions to the Indianapolis children's museum cost $5 more for and adult than a child. Admission to the museum for Barbra and Jeff and their 5 children cost $55.50 . Find the cost of each adult...

Define two variables. Then write equations. Quantity-rate equations may be helpful. Use either the elimination method or the substitution method to solve the equations. A green turtle...

Solve the system analytically 2x-5y+5z=13 5x-4y-2z=-36 x-y+4z=35 The solution set is {(_,_,_)} Solve this system 3x+3y+z=0 x-3y+2z=-21 8x-2y+3z=-41 The...

an accountant rides a bus part of the way to work everyday and walks the rest of the way. The bus averages 40mph, and the accountant walks a speed of 4mph. The distance from home to work is 27 miles,...

A group of 148 people is spending five days at a summer camp. The cook ordered 12 pounds of food for each adult and 9 pounds of food for each child. A total of 1,410 pounds of food was ordered.

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