Mathematics: Can you me and show work i don’t understand it..

Can you me and show work i don’t understand it..

Ответ:

SmokeyRN

06.01.2022

Mathematics

Step-by-step explanation:

So for this question we have to calculate Speed which is $\frac{Distance}{Time}$

The speed of the boat in still water is going upstream:

$\frac{240}{60}$ = 4 miles per hour or 4 mph

The speed of the current is going downstream:

$\frac{240}{20}$ = 12 miles per hour or 12 mph

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Ответ:

chino7083

29.03.2022

Mathematics

See Explanation

Step-by-step explanation:

Since, Points P, Q, and R are collinear and Point Q is between P and R.

$\therefore \: PR = PQ + QR \\ 13n - 10 = 4n + 3 + 6n + 8 \\ 13n - 10 = 10n + 11 \\ 13n - 10n = 11 + 10 \\ 3n = 21 \\ n = \frac{21}{3} \\ n = 7 \\ \\ PQ =4n + 3 = 4 \times 7 + 3 = 31 \\ QR = 6n + 8 = 6 \times 7 + 8 = 50 \\ PR = 13n - 10 = 13 \times 7 - 10 = 81$

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Can you me and show work i don’t understand it..

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