Holly had a gift card with a $365 balance. she bought several cds that cost $18 each. after the purchase, her gift card balance was 185 which equation can be used to determine the number of cds a she purchased.

10 CDs

Step-by-step explanation:

First, we need to find out how much she spent in total.

365 - 185 = 180

Okay, we now know that Holly spent 180 off of her gift card in total. Now we need to find out how many CDs she purchased by spending that amount of money.

180 ÷ 18 = 10

Let's check our math.

18 × 10 = 180

So our answer is Holly bought 10 CDs.

The number of CDs that she purchased is 10

Step-by-step explanation:

Let x represent the number of CDs that she purchased.

Holly had a gift card with a $365 balance. She bought several cds that cost $18 each. This means that the cost of x CDs would be 18×x = $18x.

After the purchase,her gift card balance was 185

This means that

365 - 18x = 185

Subtracting 365 from the left hand side and right hand side of the equation, it becomes

- 18x + 365 - 365 = 185 - 365

- 18x = -180

18x = 180

x = 180/18

x = 10

(0,-3) see attached graph

step-by-step explanation:

a. to solve the system, graph the two equations.

x = y+3 becomes y=x-3 has m=1/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move up 1 unit and 1 unit to the right. plot a point and connect.

y=-4x+3 has m =-4/1 and b=-3. start at (0,-3) on the y-axis and plot a point. then move down four units and to the right 1 unit. plot a point and connect.

the solution is the point (x,y) where the two lines intersect. by the graph below it is (0,-3).

b. to solve by substitution, substitute y = -4x-3 into x= y+3

x= (-4x-3) +3

x=-4x

5x=0

x=0

now substitute x = 0 back in to find y.

y= -4(0)-3

y=0-3

y=-3

solution is (0,-3)

c. use elimination by adding the equations together.

x-y=3

4x+y=-3

5x=0

x=0

then substitute into one equation to find y.

y=-4(0)-3

y=-3

75%

step-by-step explanation: