Question

1. solve the equation using the domain of x = {1, 0, 2} 2x + 3y = 7

2. Give the range of x - 2y = 0 for the domain {-1, 0, 4}

3. The interest on a loan at an interest rate of 9% over a year is I = (0.09)P, where P is the principle (loan amount) and I is the interest rate. Use a domain in the table to find the interest of these amounts for one year. Write the range only in your solution.

Principle: 10 100 1000 10,000 100,000 1,000,000
Interest:

4. What is the independent variable of this relation?

Principle: 10 100 1,000 10,000
Interest: 2 20 200 2,000

Please help :)Thanks!

Answer 1

1. first solve for any value of x.
starting with 2x + 3y = 7
subtract 2x from both sides of the equation, then divide both sides
of the equation by 3. you'll end up with:
y = (-2x + 7)/3
now just evaluate for each specific value of x.
when x=-1, y=(-2*-1 + 7)/3 = 9/3 = 3, so you have the point (-1, 3)
when x=0, y=7/3, so (0, 7/3)
when x=2, y=1, so (2, 1)

Answer 2

2.
x=-1 ---> y = -1/2
x= 0 ---> y = 0
x=4 --->y = 2
range = {-1/2 , 0 , 2}

Answer 3

3.
all you have to do is plug in

P = 10
P = 100
P = 1000

etc into I = 0.09P

to find the range

Answer 4

tell me the answer in number 3. I have given you a solution

Answer 5

@girlbyte so 3 would be 900%. But I'm still a bit stuck on #4

Answer 6

3. answer is
{0.9, 9, 90, 900, 9,000, 90,000}

Answer 7

4. The principle is independent variable

Answer 8

Okay, I totally get it now :3 Thanks so much! You've really helped, and I gave you a medal. @GirlByte

Answer 9

@heirofkawaii thx. It would help me out alot if you fanned me too ;) haha