Answer:
y = 
- 8
Step-by-step explanation:
given slope m = 
point (5, -2) for (x1, y1)
equation for point slope form
y - y1 = m(x- x1)
y - (-2) = (x -5)
y + 2 = x - 6, simplify
y = - 8,
further you can multiply by 5 to get rid of fraction
5y = 6x - 40
Multiply first, then add. 12 times 7 = 84. Then add 8. 84 + 8 = 92.
Peter's account is 910-40x, and Marla's account is 470-2x. This is a system, so you must find the number that makes both equations end up with the same number. Basically trial and error. Here is what I did:
Let's try the number 10. 910-400=510 and 470-20=450. I need a higher number.
Let's try 13 next. 910-520=390 and 470-26=444. Now the number has to be lower.
Let's try 12. 910-480=430 and 470-24=446. Close, and a little lower.
11.5 is too low, and 11.7 is too high. 11.6 has Equation 1 at 446 and Equation 2 at 446.8. Very close!
It is somewhere around 11.6. I hope that this can give you a start in figuring it out, because I don't believe in giving the complete answer, because then you do not learn anything from it.
The answer for that one is B, because 26<54
meaning 26 is less than 54 which is true
