Consider the system of equations { -2x + 6y = -8 { cx _ 3y = -4 What value of c would produce a system that has an infinite number of solutions? Justify your answer...

Consider the system of equations { -2x + 6y = -8 { cx _ 3y = -4 What value of c would produce a system that has an infinite number of solutions? Justify your answer...

how many three hour and how many four hour classes were paid for?

During strenuous exercise a certain athlete can burn 9 calories per minute on a stationary bicycle and 14.5 calories per minute on a stair climber. In a 30 minute workout the athlete burns 347 calories...

if a sandwich is 4g of fat and 280 cal / and another sandwich has 5 grams of fat and 320 calories how many of each sandwich could he eat with a 1480 cal and 22 grams of fat diet...

How do i work this problem out?

The cost of 12 oranges and 7 apples is $5.36. Eight oranges and 5 apples cost $3.68.

A 2% solution of sulfuric acid was mixed with a 12% solution of sulfuric acid to produce an 8% solution. How much 2% solution and how much 12% solution were used to produce 10 L of 8% solution?

Dried apricots worth $3.25 a pound were mixed with dried prunes worth $4.79 a pound to produce a mixture of dried fruit worth $3.79 a pound. How much of each kind of fruit was used to produce...

The tens digit of a certain two digit number is two than the units digit. The original number is 18 more than the number formed by interchanging the digits. Find the original number.

An airplane flying into a headwind travels the 1830-mile flying distance between two cities in 3 hours. On the return flight, the airplane travels this distance in 2 hours and 30 minutes. Find the...

A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is 35% salt and Solution B is 95% salt. She wants...

two boys are 15 miles apart. If they walk towards each other they meet in 3 hours. If they both walk in the same direction on boy overtakes the other on 8 hours. How fast does each boy walk?

I need help In an election, the incumbent received 25%more votes than her opponent. Altogether, 5175 votes were cast for the 2 candidates. How many votes did the incumbent mayor receive?

2x+3y+z=-8 x+9y+2z=-3 -5x-6y+5z=11

Whenever I try to solve this I get 0=0. I don't know what that means or if that's correct. Please help.

Heidi's

x=4 y=1 x=2 y=3 x=1/5 y=2/5 x=4/3 y=1/3 x=3 y=2

6x + 2y = 22 3y - z = 5 2x - 3z = 3

x + y + z = 0 x + y - z = 12 2x - 3y - z = 3

Phone Company A charges a monthly fee of $24.60, and $0.04 for each minute of talk time. Phone Company B charges a monthly fee of $20.00, and $0.06 for each minute of talk time. These two companies...