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il63 [147K]
3 years ago
15

Dr. Cwetna recorded all of the grades on a unit test on the chart below.

Mathematics
2 answers:
labwork [276]3 years ago
4 0

Answer:

1. 82.75

2.10.65

3. 93.4, 72.1

4. 104.05, 61.45

5. 114.7, 50.8

6. Yes

7.  Because of the placement of these ranges on the graph

8. 35/91 = .38 %

By taking the amount of all of the students who scored a 90 or above and dividing it by the total amount of students.

Step-by-step explanation:

PLEASE MARK ME BRANLIEST

Molodets [167]3 years ago
3 0

Answer:

I got 2 more questions can somebody answer for me plz that adds to this. In your own words, explain HOW to find the standard deviation of this data set. What does the standard deviation tell you about this data? (20 points)

Step-by-step explanation:

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2 years ago
Suppose Evan is trying to build a frame out of popsicle sticks x inches long. The frame will have length (2x – 3) and width of (
erik [133]

Answer:

The correct option is A)  3 square inches; 2x^2-7x+6.

Step-by-step explanation:

It is given that the length of the frame is (2x-3) and the width is (x-2)

The area of the rectangle is: A=l\times w

Where, A is the area l is the length and w is the width of the rectangle.

Put l=(2x-3) and w=(x-2) in the area of the rectangle.

A=(2x-3)(x-2)\\A=2x^2-4x-3x+6\\A=2x^2-7x+6

The area of the frame expressed as a polynomial is 2x^2-7x+6.

Now substitute x=3 in A=2x^2-7x+6.

A=2(3)^2-7(3)+6\\A=18-21+6\\A=3

The area of the frame is 3 square inches.

Hence, the correct option is A)  3 square inches; 2x^2-7x+6.

8 0
2 years ago
How do you find percent decrease?
snow_lady [41]
I think thats how ur welcome

5 0
3 years ago
A rhombus is cut along the diagonals to make four triangles. Which three statements are correct for any rhombus? 1) All four tri
Nikolay [14]

Answer:

1). All four triangles are right-angled.

3.) All four triangles are congruent.

4) Area of a rhombus = 4 x area of one triangle.

Step-by-step explanation:

If a rhombus is cut into four triangles using diagonals, the three statements that would apply to any rhombus would be that 'all those four triangles would be right-angled,' 'the triangles would be congruent to one another,' and 'area of one triangle * 4 would be equal to the area of the rhombus.'

As we know, the diagonals bisect one another in a rhombus at 90° and the angles opposite to one another are equal. This <u>proves that all four triangles constructed through the diagonals would be ≅ through SSS congruency and perpendicular to one another because the corresponding edges of the congruent triangles are also ≅</u> . Since the rhombus is divided into four equal parts, the area of one triangle into four would be equals to the area of the rhombus. Thus, <u>options 1, 3, and 4</u> are the correct answers.

8 0
2 years ago
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