keelyrosewillia
11.02.2021 •
Mathematics
David was thinking of a number. David doubles it, then adds 3 to get an answer of 81.6. What was the original number?
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Ответ:
39.3
Step-by-step explanation:
81.6 - 3 = 78.6
78.6 ÷ 2 = 39.3
Ответ:
The student did not distribute properly to get A = P + Prt.
The equation can be fixed by putting a factor of P in the denominator: r = (A - P) / (Pt)
I just took this part of the lesson. Good luck to all!