2m+3=23
2m=20
m=10
let me know in the comments if you need further explanation :)
Answer:
if it were an equation it would be y = mx + b and B would be the y intercept and mx is slope.
Step-by-step explanation:
You can use a tangent:

We have opposite = 17 and adjacent = x.

substitute:
cross multiply
multiply both sides by √3

divide both sides by 3

Use the Pythagorean theorem:

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Other method.
triangle.
The sides are in the ratio 
Therefore

If the price went down $5 per day for four days straight, then it would have went down $20 total after the four days.
Answer:
64 for number 1. Not sure on number 2 sorry.
Step-by-step explanation: