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3 years ago

8. Marvin's son is 3 ft tall. He casts a shadow of 1 foot. Marvin cast a

Mathematics

2 answers:

taurus [48]3 years ago

7 0

Answer:

C. 6 ft

Step-by-step explanation:

If Marvin's son is 3 feet tall with a 1 foot shadow, Marvin would be 6 feet tall with a 2 foot shadow.

Molodets [167]3 years ago

7 0

6 feet because I saw it in the test and 3 x2 is 5p6

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Two planes left simultaneously from the same airport and headed in the same direction towards another airport 3600 km away. The

ExtremeBDS [4]

Answer:

800 kph
600 kph

Step-by-step explanation:

Equation

Let s represent the speed of the faster plane. Then its travel time is ...

time = distance/speed = 3600/s

travel time for the slower plane is ...

time = distance/speed = 3600/(s -200)

The difference in these times is 1.5 hours, so we have ...

3600/(s -200) -3600/s = 1.5

Solution

Multiplying by (2/3)s(s -200), we get ...

2400(s) -2400(s -200) = s(s -200)

s^2 -200s -480000 = 0 . . . . . . . . . . rewrite in standard form

(s -800)(s +600) = 0 . . . . . . . . . . . . . factor

The positive value of s that makes a factor zero is s = 800.

Conclusion

The speed of the faster plane was 800 km/h; of the slower plane, 600 km/h.

_____

Check

The travel time for the faster plane was 3600/800 = 4.5 hours. For the slower plane, 3600/600 = 6 hours, a difference of 1.5 hours.

6 0

3 years ago

Jada has time on the weekends to earn some money. A local bookstore is looking for someone to help sort books and will pay $12.2

Agata [3.3K]

Answer:

E = 12.20(h) - 7.15

h = 6.82 hours

Given:

Pay hour = $12.20 per hour

Bus fare = $7.15

1.Equation:

Assume

She has work for "h" hours

Total earning = E

So,

E = 12.20(h) - 7.15

If,

Total earning = E = $90.45

So,

E = 12.20(h) - 7.15

90.45 = 12.20(h) - 7.15

h = 6.82 hours

7 0

4 years ago

Welder A charges $300 for every 4 of of labor. Welder B charges $240 for every 3 hours of labor. Which welder offers a better de

Nastasia [14]

Answer:

Welder A has a better deal because for each hour welder A would charger $75 while welder B would charge $80

Welder A:

300/4 = $75

Welder B:

240/3 = $80

5 0

3 years ago

Read 2 more answers

10 more than twice gorans age

Rasek [7]

Answer:

2x+10

Step-by-step explanation:

x is gorans age

6 0

3 years ago

Mrs. Cervantes wants to paint her windmill. It has six sides, each of which is 3.5 feet wide by 11 feet tall. How many square fe

wolverine [178]

Answer:

231 ft²

Step-by-step explanation:

Given that :

Dimension of each side = 3.5 feets by 11 feets

Area of each side :

Length * width = (3.5 * 11) feets = 38.5 ft²

Number of sides = 6

Hence, number of square feets to paint :

Number of sides * area of each side :

6 * 38.5 ft²

= 231 ft²

7 0

3 years ago