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olya-2409 [2.1K]
3 years ago
13

I need this answered

Mathematics
1 answer:
VashaNatasha [74]3 years ago
3 0

Answer:

-3.25 Didn't see the whole paper so correct me if I'm wrong.

Step-by-step explanation:

−2.5+0.25+−1.25+−1.5

+1.25+0.5=-3.25

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Half an hour after leaving her house Beverly was 20 miles from home. At this point she merged onto the highway and was traveling
N76 [4]

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1. 45.71 miles

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3. 89.43 miles

4. 0.79 hr

5. 0.025 hr

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speed = distance/time

After 4 hrs Beverly was 200 miles from home , however she had spent 0.5hr travelling for 20 miles prior to getting to the highway.

Therefore;

Constant speed before Highway = 20/0.5 = 40 miles/hr

Constant speed at Highway = \frac{(200-20)}{(4-0.5)} = 51.43 miles/hr

1. in 1 hr beverly will have travelled;

⇒ (20 miles in 0.5 hr ) + (0.5 hr  at speed 51.43 miles/hr)

⇒ 20 + (0.5 x 51.43) = 45.71 miles

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4. Time taken to get to 35 miles

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⇒ 0.5hr + (15/51.43) hr = 0.79 hr

5. Time taken to travel 1 mile

 ⇒ time = distance / speed = 1 mile  / 40 miles/hr

⇒ time = 0.025 hr

8 0
3 years ago
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