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3 years ago

Students at a middle school are divided into 6th, 7th, and 8th grades. A random sample of 15 students from each grade is chosen.

Mathematics

1 answer:

Julli [10]3 years ago

4 0

Answer:

B. Stratified random sample is the correct answer

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Which of the following completes the proof? Triangles ABC and EDC are formed from segments BD and AC, in which point C is betwee

kotykmax [81]

Answer: ∠ACB ≅ ∠E'C'D'; translate point D' to point B

Step-by-step explanation:

That is just my best guess.

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3 years ago

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348.91 rounded to the ones is

lakkis [162]

Answer:

349 is the answer.

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3 years ago

What is <br> a+2 divided by 2=-1

34kurt

Answer: I’m not sure. But I think it’s a=-2/2

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3 years ago

What is the value of x

Olin [163]

Answer:

x = 110

Step-by-step explanation:

The angles are alternate exterior angles and alternate exterior angles are equal when the lines are parallel

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3 years ago

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Help me please! These are due today.

IrinaVladis [17]

Answer:

${x}^{2} + 3x$

Step-by-step explanation:

Area of shaded region = Area of external rectangle - Area of internal rectangle

$= 4x(x + 2) - x(3x + 5) \\ = 4 {x}^{2} + 8x - 3 {x}^{2} - 5x \\ = 4 {x}^{2} - 3 {x}^{2} + 8x - 5x \\ = {x}^{2} + 3x \\$

Let the width of the rectangle be x inches.

Therefore, length of the rectangle = (x + 3) inches

Area of rectangle

$=(x + 3)\times x\\=x^2 + 3x\\$

Width of rectangle = 4 inches

Length of rectangle = 4 + 3 = 7 inches

Area of rectangle = 7*4 = 28 square inches.

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3 years ago