ritasolomon85
27.07.2019 •
Mathematics
An electrician uses the equation c = 45t + 60 to calculate what he charges to work on a project. c is the total cost in dollars of what he will charge, and t is the number of hours the project takes to complete. what are the interpretations of the slope and intercept in the equation?
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Ответ:
Since 45 is multiplied by t, the amount of time, this shows us it is the cost per hour. Since that is the slope, the y-intercept must be 60. We know that y-intercepts are where the data intersects the y-axis; we also know they have an x (t, in this case) coordinate of 0. This means 0 hours have passed, which means it is an up front fee.
Ответ:
41
Step-by-step explanation:
8 x 7 - 5 ( - 6)
= 8 x 7 - 5 ( 9 - 6 )
= 8 x 7 - 5 x 3
= 56 - 15
= 41