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Annette [7]
2 years ago
14

An athlete runs 1 mile along a normal 400m athletic track and finishes exactly on the finish line. Where did he start from? ( 1

mile=1.609km)
Mathematics
1 answer:
AlekseyPX2 years ago
3 0

Answer:

He started 9 meters before the start/finish line

Step-by-step explanation:

1mile = 1.609 km

1.609 km * 1000meter/1km = 1609 meters


He ran 1609 meters

each lap is 400 meters

he ran 4 laps

4*400 = 1600

1609-1600 = 9 meters

He started 9 meters before the start/finish line

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2 years ago
(13x2+9x-4)-(12x2-2x+6)<br> add or subtract the polynomials
bearhunter [10]

Answer:

x^{2} +11x-10

Step-by-step explanation:

(13x^{2} +9x-4)-(12x^{2} -2x+6)

Remove the brackets and multiply the minus sign through all the numbers in the second polynomial

13x^{2} +9x-4-12x^{2} +2x-6

Rearrange in the highest order

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6 0
3 years ago
Help me on 12 and 13 please
posledela

Answer:

12. h=3

13. h=-3

Step-by-step explanation:

12. Recall that -2^{x-h} is a horizontal shift since h is being applied within the operation to the input. This means that h will slide the function left or right. Since the function f has a point at (1,-2) and g has the same point at (4,-2) then the function has moved 3 units 1+3=4 to the right. h=3.

13. Once again, h is a horizontal shift meaning the graphs has moved left or right only. Looking at g it has a point at (-2,2) while f has the same point at (1,2). So the graph f has moved to the left 3 units. This is h=-3 since 1+-3 = -2.

5 0
3 years ago
One electrician charges his customers a $60 service fee plus $35 per hour.
gavmur [86]

Answer:

2 hours; $130

Step-by-step explanation:

We can do this by setting up an equality since we are finding when they are the same. Say x is the number of horus:

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x = 2 hours

The cost will be the same at two hours, and plugging it in, we can get 65*2=130.

5 0
2 years ago
a baby was born with a weight of five pounds and then began to gain 1.25 pounds per month. write an equation for w in terms of t
Wewaii [24]

Answer:

w times t

Step-by-step explanation:

6 0
3 years ago
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