1. solve the system by using a table. 3y=4x+7 , -4x-4y=28. these are the possible solutions: a) (–4, –3), b) (–3, –4), c) (4, 3), d) (3, 4).
2.solve by graphing. -3x-y=-10, 4x-4y=8. possible solutions: a) (-1,3), b) (3-1), c) (1,3), d) (3,1)
3. the spreadsheet shows the monthly revenue and expenses for a new business. use the models to predict the month in which revenue will equal expenses. possible answers:
a) october
b) september
c) august
d) may

1) (A) (-4,-3)

2) (D) (3,1)

3) (B) September

Step-by-step explanation:

1) 4x+7=3y

-4x-4y=28

By elimination method, we get y= -3 and x= -4

Hence (A)(-4,-3) is correct.

2) We will pot the points for the equations -3-y= -10 and 4x-4y = 8

The point of intersection is the solution that is (D) (3,1).

3) We can solve it by assuming  revenue - expenses, and for revenue= expenses

We need to prove difference = 0

Let x denotes the month and y denotes the difference between revenue and expenses.

Then for January = (1,18000)

Feb = (2,15000)

march = (3,12000)

April =  (4,11000)

may =  (5,9000) and so on  

The best fit line for the points is y= -2200x+19,600

We need y= 0

Then, x = 19,600/2200

            = 8.9 = 9 (approx)

In 9th month (September) the difference will be 0 and revenue = expenses.

(B) is correct.

y > 1/3x

y < = -x + 4

hope this : )

75

step-by-step explanation:

you do x-29=46 (the number of cantaloupes sold)

in order to find x, you have to find what minus 29 equals 46, meaning you'd have to add 29 to 46.

29+46=75

if you replace x with 75, the equation looks like:

75-29=46

x=75