87.1
remember a²+b²=c²
take the root on both sides, then you get what the calculation in the screenshot means.
Answer:
Step-by-step explanation:
Use the equation
89 < 75 + 0.7*M Subtract 75 from both sides
89 - 75 < 0.7M Combine
14 < 0.7 M Divide both sides by 0.7
14/0.7 < M
20 < M
If M goes over 20 then the flat rate is cheaper.
540 divided by 4 is 135 so C
What about that??? I don't what to solve for
0ne and one fifth or 1 and 1/5