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3 years ago

Ten increased by 6 times a number plus 3times the number is the same as 9more than 12 times the number

Mathematics

1 answer:

nirvana33 [79]3 years ago

8 0

It is 14 and divide by 4 is 36

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Is i have 5 red marbles, 2 green and 3 blue, what is the probability of drawing two blue marbles in a row?

kherson [118]

So the chance of getting 1 blue marble is 30% or 3/10, the chance of getting another in a row is also 3/10 since its asking for both youd do 3/10*3/10 = 9/100

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3 years ago

A carpenter leans a 20-foot ladder against a building so that an angle of 60° is formed between the ladder and the ground. How m

iogann1982 [59]

Answer:

The foot of the ladder is

feet away from the base of the wall.

Step-by-step explanation:

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3 years ago

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Plssssss help brainiest

disa [49]

Answer:

sorry I can't understand this please write and send and pass aur comment me I will tell this answer

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3 years ago

Please help me with #7

Dominik [7]

Step-by-step answer:

This is a regular heptagon, means it has 7 <em>congruent</em> sides and 7 <em>congruent </em>vertex angles.

To work with polygons, there is a very important piece of information that you must know to solve the majority of related problems.

This is:

sum of exterior angles of polygons = 360 degrees.

If you don't remember the 360 degrees, think of the sum of exterior angles of an equilateral triangle, which is 3*(180-60)=3*120=360! It works!

For a regular heptagon, c = 360/7=51.43 degrees approx.

This means that each vertex angle measures

vertex angle = 180-c

So since 2d+the vertex angle = 360, we have

2d+(180-c)=360

solve for d:

2d=360-(180-c)=180+c

d=(180+c)/2=90+c/2=115.71 degrees. (approx.)

8 0

3 years ago

I need to know the answer please…

Triss [41]

Answer is a= 51/7 or 7 2/7

Step by step

-2/3 (a + 3) = 5/3a - 19

Distribute to resolve parentheses

-2/3a -2 = 5/3a - 19

Now to move variables to one side
Add 2/3a to both sides

-2/3a + 2/3a -2 = 5/3a + 2/3a -19

Combine like terms

-2 = 7/3a -19

Add 19 to both sides to isolate variable

-2 +19 = 7/3a -19 + 19

17 = 7/3a

Divide both sides by 7/3 to solve for a
(Remember when you divide a fraction, flip it and multiply.)

17 * 3/7 = a

51/7 = a

Picture attached shows steps in order, I think that is what you also needed?

5 0

1 year ago