The following graph shows the relationship between cost and revenue for a manufacturer of lab coats.

i - cost: 1.5n+1,600
ii - cost: 4.5n+1,600
iii - revenue: 3.25
iv - revenue: 5.75

which of the following pairs of equations best suits this graph?

a.
i and iii

b.
i and iv

c.
ii and iii

d.
ii and iv

Option a.

I and III

Step-by-step explanation:

Observing the graph

For n=400 coats

The cost is about $2,200

and

The revenue is less than $1,400

Substitute the value of n=400 in each equation to find the solution

I Cost 1.5(400)+1,600=$2,200 > is ok

II Cost 4.5(400)+1,600=$3,400 > is not ok ( is greater than $2,200)

III Revenue 3.25(400)=$1,300 > is ok ( is less than $1,400)

IV Revenue 5.75(400)=$2,300 > is not ok ( is greater than $1,400)

therefore

The solution is I and III

answer:   b

step-by-step explanation:

x2 = 16

x can not be a negative number because 16 is positive

the only answer would be positive 8  

$655.61 which is option c

step-by-step explanation:

price of house =   $146,000

initial rate = 3.5%

mortgaged paid in this = 3.5 % of $146,000

                                        =

                                        =$5110

the total years would be = 7

total mortgaged paid = 7 * $5110

                                      =$35770

remaining money = $146000-35770

                                =$110230

new mortgaged payment = 5 % of 110230

                                            =  

                                            =$655.61