Twenty students in class A an 20 students in class B were asked how many hours they took prepare for a exam

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Answer 1

Answer: what are you talking about

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I just need the answer for number 15 please

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Answer:

Step-by-step explanation:

Estimate the sum or difference?
6/10 + 7/12
Not sure how to do?

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is it a mixed number or a improper fraction?

Find the area of the regular 20-gon with radius 13 mm.

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Inside a circle with a radius of 2mm, a 20-sided regular polygon is inscribed.
Each of the 20 vertices is on the circuference of the circle, at 2 mm from the center.
Since the polygon is a regular 20-gon, all the sides an angles have the same measure, and you could connect all the vertices to the center and split that 20-gon into 20 isosceles triangles with 2mm legs.

As we are splitting, let's draw a line from the middle of each side to the center, spiltting each isosceles triangle into 2 right triangles.

The area of the 20-gon, made up of 40 of those little right triangles, will be 12.36mm^2

Graph the equation. Identify the vertex and the axis of symmetry.y=-3x^2-6

Select one:
a. Vertex: (0, 6)
Axis of symmetry: x = 0

b. Vertex: (6,0)
Axis of symmetry: x = 6

c. Vertex: (0, -6)Axis of symmetry: x = 0
d. Vertex: (-6, 0)
Axis of symmetry: x = -6

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I think B is the answer

what is the algebraic expression represents the phrase “the quotient of negative eight and the sum of a number and three”?

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You set it up like this.

So quotient means that you're dividing, so put a ÷
Next, it says the dividend, or the part being divided is -8, so now you have this: -8 ÷
Lastly, it says the divisor, or the part doing the dividing, is a quantity equal to the sum of "some number" (we'll use x) and 3. Since the divisor is one quantity collectively, you have to put it in parentheses.
This gives you: (x + 3)
When you put it all together, you get -8 ÷ (x + 3).
This can also be written as a fraction by putting -8 over (x+3).

The algebraic expression represents the phrase “The quotient of negative eight and the sum of a number and three” as –8 / (x + 3).

What is Algebra?

Algebra is the study of graphic formulas, while logic is the interpretation among those signs.

The algebraic expression represents the phrase is given below.

“The quotient of negative eight and the sum of a number and three”

Let x be the number.

Then the sum of a number and three. Then the expression will be

⇒ x + 3

Then the quotient of negative eight and the sum of a number and three. Then the expression will be given as,

⇒ –8 / (x + 3)

Thus, the quotient of negative eight and the sum of a number and three will be –8 / (x + 3).

More about the Algebra link is given below.

brainly.com/question/953809

#SPJ6

20 is what % greater than 5

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find how much greater 20 is than 5
20-5=15
the % is of 5, so the percent is percent out of 5

20 is x% of 5 greater than 5
20=(x%)5+5
minus 5 both sides
15=(x%)5
divide both sides by 5
3=x%
percent means parts out of 100
x%=x/100
3=x/100
times 100 both sides
300=x

answer is 300%

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