PineaPPle663

PineaPPle663

27.12.2020 •

Mathematics

Divide. 445.50÷9
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Ответ:

wshemekia3oyliv4

19.03.2021

a) Terrance's speed- 12 $\frac {{textrm{ miles}}}{{textrm{ hours}}}$

Jesse's speed -8 $\frac{{textrm{ miles}}}{{textrm{ hour}}}$

b) Teerance ;- 4 hr 10 min ; Jesse ;- 6 hr 15 min

c) Sandra's speed :- $10 \dfrac{2}{3} \frac{{textrm{ mile}}}{{textrm{ hour}}}$

Step-by-step explanation:

Terrance runs

in $\frac {1}{2}$ an hour 6 miles

So in 1 hour he / she runs $(6 \times 2)$ miles

= 12 miles.

So Terrance's speed is 12 $\frac {{textrm{ miles}}}{{textrm{ hours}}}$ ---(1)

Jesse's runs

In 15 minutes 2 miles

So, In 1 minute $\frac {2}{15}$ miles

So, in 60 minutes $\frac {2}{15} \times 60$ miles

= 8 miles

So, Jesse's speed is 8 $\frac{{textrm{ miles}}}{{textrm{ hour}}}$ ----------(2)

Terrance runs,

12 miles in 1 hour

so, 1 mile in $\frac {1}{12}$ hour

so, 50 miles in $\frac {50}{12}$ hour

= $4 \dfrac{1}{6}$ hour

=4 hour $\frac {60}{6}$ minutes

= 4 hour 10 minutes.

Jesse runs,

8 miles in 1 hour

so, 50 miles in $\frac {50}{8}$ hour

= $6 \dfrac{1}{4}$ hour

= 6 hour $\frac {60}{4}$ minutes

= 6 hour 15 minutes

Sandra runs,

in 45 minutes 8 miles

so, in 1 minute $\frac {8}{45}$ mile

so, in 60 minutes $\frac {8}{45} \times 60$ miles

= $10 \dfrac{2}{3}$ miles

So Sandra's speed is , $10 \dfrac{2}{3} \frac{{textrm{ mile}}}{{textrm{ hour}}}$ ---------------- (3)

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