Which strategy best explains how to solve this problem?
emily bought a wreath and 2 boxes of outdoor lights every year. the wreath costs $14.99 and each box of lights costs $3.99.
what is the total amount of money emily spent after 5 years?
a.
guess and test.
guess that emily spent $30. multiply $3.99 by 2. then add that answer to $14.99. divide this number by 5. if the answer is not 30, then revise your guess, and test your answer again.
b.
work backward.
start by multiplying $3.99 by 2 to find the cost of the lights. add the cost of the wreath to the sum and then divide by 5.
c.
draw a diagram.
draw a large circle. draw 2 squares inside the circle and a triangle. write $3.99 in each square and write $14.99 inside the triangle. add up all the amounts inside the circle ($22.97) to find the amount emily spent in 1 year. multiply the amount by 5 to find the amount spent in 5 years.
plz plz hurry!

a.   we have two

lines:   y = 4-x   and  

y = 8-x^-1

given two simultaneous equations that are both to be

true, then the solution is the points where the lines cross. the intersection is

where the two equations are equal. therefore the solution that works for both

equations is when

4-x = 8-x^-1

this is where the two lines will cross and that is the

common point that satisfies both equations.

b.   4-x = 8-x^-1

  x           4-x       8-x^-1

-3           7        

8.33

-2           6         8.5

-1           5         9

  0           4        

-

  1           3        

7

  2           2        

7.5

  3           1         7.67

the table shows that none of the x values from -3 to 3 is

the solution because in no case does

4-x = 8-x^-1

to find the solution we need to rearrange the equation to

find for x:

4-x = 8-x^-1

multiply both sides with x:

4x-x^2 = 8x-1

x^2+4x-1=0

x= -4.236, 0.236

therefore there are two points that satisfies the

equation.

find y:  

x=-4.236

y = 4-x   = 4 – (-4.236)

= 8.236

y = 8-x^-1 =   .236)^-1

= 8.236

x=0.236

  y = 4-x   = 4 – (0.236) = 3.764

y = 8-x^-1 =   8-(0.236)^-1

= 3.764

thus the two lines cross at 2 points:

(-4.236, 8.236) & (0.236, 3.764)

c.   to solve

graphically the equation 4-x = 8-x^-1

we would graph both lines: y = 4-x   and   y

= 8-x^-1

the point on the graph where the lines cross is the

solution to the system of equations.

just graph the points on part b on a cartesian coordinate

system and extend the two lines.   the

solution is, as stated, the point where the two lines cross on the graph.

step-by-step explanation:

mark brainliest!