sandaepoe001

03.04.2020 • 

Mathematics

Two car owners are in need of car repairs. Darnel will need to pay the mechanic $10 per hour for labor, plus $20 to cover the cost of new parts. Troy will need to pay $5 for parts and $15 per hour for labor.

Depending on how long each repair takes, the two jobs might end up costing the same amount. How much time would that take, and how much would it cost? Express your answer as an ordered pair (x, y), where the x-axis is the number of hours and the y-axis is the cost.

Ответ:

bri1334

07.12.2021

Mathematics

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For many years, organized crime ran a numbers game that is now run legally by many state governments. the player selects a three digit number from 000 to 999. there are 1000 such numbers. a bet of $1 is placed on a number, say number 115. if the number is selected, the player wins $500. if any other number is selected, the player wins nothing. find the expected value for this game and describe what it means 

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