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notsponge [240]
3 years ago
5

Margie takes a random sample of 30 students in her seventh-grade class and finds that 75% of the sample prefers the color blue o

ver the color red. There are 125 students in the seventh grade. Based on the sample proportion, about how many students in the seventh grade would be expected to prefer blue over red?
30
75
94
125
Mathematics
2 answers:
4vir4ik [10]3 years ago
8 0
First you turn 75% into a decimal (.75. Then you multiply that by 125 to get about 94. 
The answer would be 94.
To check this you can turn it into a fraction 94/125 then turn it into a fraction which would be 75%
KATRIN_1 [288]3 years ago
7 0

Answer:

its is 94

Step-by-step explanation:

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Does anyone know how to turn these fractions into percents??? please help!!!
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You divide the fractions to get percents
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Please help i have to turn in in 8 mins....thanks :)
pychu [463]

6√3

Step-by-step explanation:

6 is x. side across from right angle (12) is 2x. so 6x2 to get 12. missing side is x√3. so 6√3

6 0
2 years ago
Read 2 more answers
Triangle ABC is an equilateral triangle with side lengths labeled a, b, and c.
Butoxors [25]

Answer:

the answers are all bold below

Step-by-step explanation:

Triangle ABC is an equilateral triangle with side lengths labeled a, b, and c.

Triangle A B C is an equilateral triangle. The length of side A B is c, the length of B C is a, and the length of A C is b.

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Which expressions represent the area of triangle ABC? Select three options.

a c sine (60 degrees)

One-half b c sine (60 degrees)

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6 0
3 years ago
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Please help solve for PQ.
DerKrebs [107]
This problem cannot be solved unless we are given figure NPQR is a rhombus.
In that case, then all sides are equal, meaning 
5x+16=9x-32
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8 0
2 years ago
Please help me AAAAAA
bezimeni [28]

Answer:

45

Step-by-step explanation:

AEF is a similar triangle to ABC. that means it has the same angles, and the sides (and all other lines in the triangle) are scaled from the ABC length to the AEF length by the same factor f.

now, what is f ?

we know this from the relation of AC to FA.

FA = 12 mm

AC = 12 + 28 = 40 mm

so, going from AC to FA we multiply AC by f so that

AC × f = FA

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f = 12/40 = 3/10

all other sides, heights, ... if ABC translate to their smaller counterparts in AEF by that multiplication with f (= 3/10).

the area of a triangle is

baseline × height / 2

aABC = 500

and because of the similarity we don't need to calculate the side and height in absolute numbers. we can use the relative sizes by referring to the original dimensions and the scaling factor f.

baseline small = baseline large × f

height small = height large × f

we know that

baseline large × height large / 2 = 500

baseline large × height large = 1000

aAEF = baseline small × height small / 2 =

= baseline large × f × height large × f / 2 =

= baseline large × height large × f² / 2 =

= 1000 × f² / 2 = 500 × f² = 500 ×(3/10)² =

= 500 × 9/100 = 5 × 9 = 45 mm²

8 0
2 years ago
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