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Tems11 [23]
2 years ago
15

There are 580 students at Alejandro’s school. He surveys a random sample of 60 students and finds that 21 of them regularly brin

g their lunch. Based on these results, estimate how many students at Alejandro’s school regularly bring their lunch.
Mathematics
1 answer:
V125BC [204]2 years ago
6 0

Answer:

63

Step-by-step explanation:

If you have the total number of students at the school, you can divide that by 60 and you get 3. You make 21 and 60 a fraction to get you 21/60. You then multiply 21 by 3 to get 63. 63 kids pack lunch.*

*not sure if this is correct or not?

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Nookie1986 [14]

Answer:

do u even still need the answer its been aweek since you asked it and it was due that same day

Step-by-step explanation:

3 0
2 years ago
A rectangular garden must have a perimeter of 150 feet and an area of at least 1200 square feet. Describe the possible lengths o
kipiarov [429]

Answer: 51.86 and 23.14

Step-by-step explanation:

The rectangular garden must have a perimeter of 150 feet

Perimeter of rectangular garden =

2l + 2w=150 -----------1

The rectangular garden must have a perimeter of 150 feet and an area of at least 1200 square feet.

Area of rectangular garden =

l×w= 1200 feet^2 -----------2

From equation 2, l=1200/w

Put l=1200/w in equation 1

2× 1200/w + 2w = 150

(2400/w) +2w = 150

(2400+2w^2)/w =150

2400+2w^2= 150w

2w^2- 150w+2400=0

Using the general formula

w = [-b+-√(b^2-4ac)]/2a

a = 2, b =-150, c=2400

w =[--150+/-√(-150^2-4×2×2400)]/2×2

=[150+/-√(22500-19200)]/4

=[150+/-√3300)]/4

=(150+57.45)/4 or (150-57.45)/4

w= 207.45/4 or 92.55/4

w= 51.86 or w= 23.14

l = 1200/51.86 or l= 1200/23.14

l = 23.14. or l= 51.86

For an area of at least 1200ft^2

The dimensions are 51.86 and 23.14

4 0
3 years ago
Helppppppp pleaseee
Viktor [21]

Answer:

x=2\sqrt{5}

Step-by-step explanation:

If that is a square, then all sides are the same. Therefore, it's a \sqrt{10} by \sqrt{10} shape. We'll use Pythagorean Theorem to find the diagonal.

a^2+b^2=c^2\\\sqrt{10}^2+ \sqrt{10}^2=x^2\\10+10=x^2\\20=x^2\\\sqrt{20}=x\\\sqrt{4*5}=x\\ 2\sqrt{5}=x

Since it's not a fraction, there is no denominator to rationalize. Let me know if you have any other questions!

5 0
2 years ago
Several large bowls are containing various amounts of tangerines on a table. When 12 of the bowls each had 8 more tangerines add
Genrish500 [490]

Answer:

4

Step-by-step explanation:

3 0
3 years ago
A rectangular stained glass window is made up of identical triangular parts as pictured below.
Pachacha [2.7K]
36/4=9 48/3=16 so 9*16=144/2=72 so it is 72 square inches
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2 years ago
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