brianna wants to buy a digital camera for a photography class. one store offers the camera for $47 down and a payment plan of $20 per month. the payment plan for a second store is described by y = 15x + 77, where y is the total cost in dollars and x is the number of months. which camera is cheaper when the camera is paid off in 12 months? complete the explanation

Step-by-step explanation:

Plan for store 1,

y = 47 + 20x

Here y = cost of the camera

x = number of months to pay

Plan for store 2,

y = 15x + 77

If Brianna pays off the amount in 12 months,

So for x = 12 months,

For store 1,

y = 47 + (20×12)

y = $287

For store 2,

y = 15(12) + 77

y = 180 + 77

y = $257

The camera at the second store is cheaper when he camera is paid off in 12 months because the cost at the first store is $287 and cost at the second store is $257.

(-1,-0.5)

step-by-step explanation:

step-by-step explanation:

1. practice, practice & more practice

2. review errors

3. master the key concepts

do not try to memorise the processes.

4. understand your doubts.

5. create a distraction free study environment

6. create a mathematical dictionary

7. apply maths to real world problems.