Solve the system using substitution. write the solution as an ordered pair. (1 point) show your work for full credit! (2 points)

-5x + y = -1
y - 4x = -3

The solution is (-2,-11)

Step-by-step explanation:

The given system is

and

Make y the subject in the first equation to get;

Put into the second equation.

Group similar terms;

Put into .

This implies that;

The solution is (-2,-11)

(-2, -11)

Step-by-step explanation:

We are given the following two equations:

--- (1)

--- (2)

From equation (2):

Substituting this value of y in equation (1) to get:

Now substituting the value of x in equation (2) to get:

Therefore, the solution of the equations as an ordered pair is (-2, -11).

sina-sinb

cosb+cosa

tana-tanb

cos0+cos x pi/3

20tan

step-by-step explanation:

answer: hence, function will be

explanation:

since we have given that

cost of a new textbook = $85

according to question, the resale value of a textbook decreases by 25% with each previous owner,

so, our function becomes,

here, y is the total value of the text book after x owners.

hence, function will be