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Norma-Jean [14]
3 years ago
11

Each of a certain type of tire on a 4 wheel car lasts exactly 10,000 miles. How many spare tires of this same variety must carri

ed so that a trip of 15,000 miles can just be completed.
Mathematics
1 answer:
Lesechka [4]3 years ago
5 0
3 spare tires are needed. This works if you rotate the tires every 5,000 miles. 

Tire A, B, C, D (and spare is E F G)
first 5,000 miles you use tire A B C D
second 5000 miles you use tire B C D E
third 5000 miles you use A E F G

Each tires is used no more than twice (10,000 miles).
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A metal ring hole barrels together has a radius of 3 ft find the circumference and area
irina1246 [14]
Circumference = 2*pi*radius = 2*3.14*3 = 18.84 ft

Area = pi*radius^2 = 3.14*3*3= 28.26 ft^2
7 0
3 years ago
the parallel sides of a trapezium are such that the longer side is 4cm more than the shorter side of the distance between them i
saw5 [17]

Answer:

32cm and 28cm

Step-by-step explanation:

Area of a trapezium=0.5 ( sum of parallel sides ) × height

600=0.5( 4+a+a)×20

where a is the length of the shorter side

600÷0.5=(4+2a)×20

1200=(4+2a)×20

1200÷20=4+2a

60=4+2a

60-4=2a

56=2a

56÷2=a

28=a.

since the longer side is 4 cm more than th shorter side , 28 +4=32

4 0
3 years ago
4 there are only red sweets and yellow sweets in a bag.
Taya2010 [7]

Using the probability concept, it is found that since the number of red sweets would be a decimal number, the probability cannot be \dfrac{7}{10}

<h3>What is probability?</h3>

Probability is defined as the ratio of the number of favourable outcomes to the total number of outcomes in other words the probability is the number that shows the happening of the event.

In this problem:

  • In total, there are 8 + n sweets in the bag.
  • Of those, n are red.

The probability of red is:

p=\dfrac{n}{n+8}

Supposing, we solve for n:

\dfrac{n}{n+8} = \dfrac{7}{10}

10n = 7n + 56

3n = 56

n  =  56 / 3

n  =  18.67

Since the number of red sweets would be a decimal number, the probability cannot be 7 / 10

To know more about probability follow

brainly.com/question/24756209

#SPJ1

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2 years ago
Which of the following equations have exactly one<br> solution?
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I need to see a picture of the question so I can answer the question:)
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3 years ago
A mother is 13/4 times as tall as her son. Her son is 3 feet tall how tall is the mother.
Kazeer [188]
They’re both really y’all
7 0
3 years ago
Read 2 more answers
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