Does the equation 7c+8p=29.60 help us to solve the original system? 5c+4p=18.40 2c+4p=11.20 If you think so, explain how it helps. If you don't think so, explain why not and what would help us solve the system.

Step-by-step explanation:

Given the simultaneous equation

5c+4p=18.40 2

2c+4p=11.202

According to the equation given  7c+8p=29.60, we will see that the two equation was added to get the required equation in question. Note that this equation  7c+8p=29.60 cannot help us to solve the simultaneous equation because the resulting equation is one equation with two unknown variables. For us to get a solution to the simultaneous equation, we need to reduce the system of equation to just an equation and a variable. This can be gotten by taking the difference of the two equation as shown: (Elimination method)

Equation 1 - equation 2 will give;

(5c-2c)+(4p-4p) = 18.40-11.20

3c+0 = 29.60

3c = 29.60

Divide both sides by 3

3c/3 = 29.60/3

c = 9.87

Substitute c = 9.87 into equation 2

From 2: 2c+4p = 11.20

c + 2p = 5.60

9.87 + 2p = 5.60

2p = 5.60 - 9.87

2p= -4.27

p = -4.27/2

p = -2.135

You can see that what helped in solving the system of equation is by eliminating one of the variables first using the Elimination method.

the answer is c. hope this !

step-by-step explanation:

idk

step-by-step explanation: