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Nuetrik [128]
3 years ago
14

Sean has to read a book during summer break. He read 144 pages in 3 hours on the way to his grandma's house. If Sean reads at th

e same pace, how long will it take Sean to finish his 264-page book?
Mathematics
1 answer:
Elenna [48]3 years ago
4 0
Sean reads his book by what speed
This answer is quite unorthodox
LIke a speed question. We will find the amount of pages Sean read per hour or minutes if u want to convert

So speed of reading = amount of pages read/ time
                                 = 144/3 hours or 144/3*60 minutes
                                  =48               or 8/10 minutes

So time taken to complete his book at the same pace he is reading 
amount of pages to read/speed of reading
=264/48      or 264*10/8
=5.5 hours  or 330 minutes

hope u understood
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liubo4ka [24]

Answer:

a y=25+89x b 25 c 14

Step-by-step explanation:

89*22=1958

1983-1958=25(service fee)

(1271-25)/89=14

6 0
3 years ago
Casey bought sandwiches and bags of chips. Each sandwich cost three times asmuch as a bag of chips. She bought 5 sandwiches for
Lerok [7]

Answer:

Casey Bought 6 bags of chips

Step-by-step explanation:

If each sandwich costs 3 times the amount of a bag of chips and the sandwich is 6 dollars, the chips are 2 dollars. Casey bought 5 sandwiches and spent $30 dollars on sandwiches. Since the total was $42 dollars you have $12 dollars left to get your total of $42. 2x6 = 12 so therefore Casey bought 6 bags of chips.

5 0
3 years ago
In a right triangle ABC, CD is an altitude, such that AD=BC. Find AC, if AB=3 cm, and CD= 2 cm.
konstantin123 [22]

Consider right triangle ΔABC with legs AC and BC and hypotenuse AB. Draw the altitude CD.

1. Theorem: The length of each leg of a right triangle is the geometric mean of the length of the hypotenuse and the length of the segment of the hypotenuse adjacent to that leg.

According to this theorem,

BC^2=BD\cdot AB.

Let BC=x cm, then AD=BC=x cm and BD=AB-AD=3-x cm. Then

x^2=(3-x)\cdot 3,\\ \\x^2=9-3x,\\ \\x^2+3x-9=0,\\ \\D=3^2-4\cdot (-9)=9+36=45,\\ \\\sqrt{D}=\sqrt{45}=3\sqrt{5},\\ \\x_1=\dfrac{-3-3\sqrt{5} }{2}0.

Take positive value x. You get

AD=BC=\dfrac{-3+3\sqrt{5} }{2}\ cm.

2. According to the previous theorem,

AC^2=AD\cdot AB.

Then

AC^2=\dfrac{-3+3\sqrt{5} }{2}\cdot 3=\dfrac{-9+9\sqrt{5} }{2},\\ \\AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

Answer: AC=\sqrt{\dfrac{-9+9\sqrt{5} }{2}}\ cm.

This solution doesn't need CD=2 cm. Note that if AB=3cm and CD=2cm, then

CD^2=AD\cdot DB,\\ \\2^2=AD\cdot (3-AD),\\ \\AD^2-3AD+4=0,\\ \\D

This means that you cannot find solutions of this equation. Then CD≠2 cm.

8 0
3 years ago
Read 2 more answers
Mr. Rifkin had 240 digital and manual cameras. After donating 82 digital cameras and 26 manual cameras, he had three times as ma
puteri [66]
After the donation,
3m + m = 132
manual = 33
digital = 99

Before the donation, he had 82 more digital and 26 more manual cameras.
82 + 99 = 181 digital
26 + 33 = 59 manual
For a double check, before donation,
digital + manual = 240
181 + 59 = 240
So, to begin with, the number of digital cameras = 181.


3 0
3 years ago
Read 2 more answers
Ajay is 5 cm taller than Aiden. If h represents Ajay's height, then Aiden's height is
ohaa [14]
H - 5cm = Aiden’s height?
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2 years ago
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