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Rina8888 [55]
3 years ago
11

28 students travel on a field trip . They bring a van that can seat 12 students . Elena and Kiran's teacher asks other adults to

drive cars that seat 3 children each to transport the rest of the students . Elena wonders if she should use the inequality 12 + 3n > 28 or to figure out how many cars are needed . Kiran doesn't think it matters in this case . Do you agree with Kiran ? Explain 12 + 3n >= 28 your reasoning .
Need an answer please!! :(
Mathematics
1 answer:
Radda [10]3 years ago
4 0

Answer:

Yes, you can use this inequality to find the numbers of cars required.

Step-by-step explanation:

12  + 3n > 28     where n = the number of cars required

3n > 28 -12

3n > 16

n > 5 1/3

Greater than 5 1/3 gives 6 cars.

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In a certain region, there is a 0.1 probability that any checked passerine bird's nest will
mamaluj [8]

Answer:

Probability of at least two cuckoo eggs is 0.738.

Step-by-step explanation:

probability of cuckoo egg = 0.1

probability of not a cuckoo egg = 1 - 0.1 = 0.9

Probability of at least two cuckoo eggs is

= Probability of two cuckoo eggs x probability of 1 not cuckoo egg +

probability of three cuckoo eggs

= 0.1 x 0.1 x 0.9 + 0.9 x 0.9 x 0.9

= 0.009 + 0.729

= 0.738  

5 0
2 years ago
91. Jack can read 45 pages of his book in one and a
Digiron [165]

Answer:

10 hours

Step-by-step explanation:

45 pages per 1 hour and 30 minutes,  or 60 min +30 min =90 min

90 minutes / 45 pages has to be equal to an equivalent fraction where we have 300 pages

90 minutes /45 pages = ? minutes / 300 pages , multiply both sides by 300

? minutes = 90*300/45 = 600 minutes

to read 300-page book will take 600 minutes = 10 hours

3 0
2 years ago
Find 3/4ths of 40 ......................................................
Mkey [24]
30. 

3/4 is equal to 75%, so take 75% of 40 by multiplying .75 by 40 to get 30
5 0
2 years ago
Read 2 more answers
The angles in a triangle are in the ratio 1:2:3. Show that the triangle is a right - angled triangle.
Alja [10]

Answer:

Angles in a triangles add up to 180°

Respectively 1 : 2 : 3 is going to be 1 x , 2 x and 3 x so,

1 x + 2 x + 3 x = 180°

⇒ Simplify

6 x = 180°

⇒ Divide by 6 on both sides to isolate x

x = 30°

Since the ratio was 1 x : 2 x : 3 x and x is 30°,

30 : 60 : 90

And since there is a 90° angle, it is a right - angled triangle

4 0
3 years ago
PLEASE HELP!!! The side lengths of a square are each 5q. By adding 3 to the length and subtracting 3 from the width, a rectangle
Oksanka [162]

Answer:

Option C

Step-by-step explanation:

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Factor these, and you shall get 25q^2+15q-15q-9. Simplify that into

25q^2-9

8 0
3 years ago
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