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2 years ago

3x + 8x - 2 = 20 I need help asap

Mathematics

2 answers:

klio [65]2 years ago

8 0

Answer:

Step-by-step explanation:

3x + 8x - 2 = 20

11x=22

x=2

Paha777 [63]2 years ago

6 0

Answer:

x = 2

Step-by-step explanation:

Given

3x + 8x - 2 = 20 , that is

11x - 2 = 20 ( add 2 to both sides )

11x = 22 ( divide both sides by 11 )

x = 2

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In a class of 25 students, 15 of them have a cat,

Tju [1.3M]

Answer:

9/25

Step-by-step explanation:

I used to struggle on these too, but I'll exaplain the best I can. Firstly, we know that 3 people don't have a cat or a dog, so what we do is we minus that from 25. This becomes 22. Now, we have to add the amount of people who have a cat to the amount of people who have a dog, and then minus it from 22, because that is the amount of people without double ups in the class with at least either one of the pets given. So, 16+15=31. Now, we do 31-22, which is equal to 9. Therefore, 9/25 people, (because the question asked out of random in the class), have a cat and a dog. This is because the double up are the extra amount of people who had more than one pet. Hopefully this was helpful. I'm sorry if it is not as probability is a hard topic to explain.

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5 0

2 years ago

Simplify the expression. 3 - 4 +7 - 4

Tresset [83]

2
3+7=10
-4-4=-8
10-8=2

4 0

2 years ago

Which choice is a correct equation for the line graphed below? Please hurry!!!

dsp73

Answer:

y = 3x + 1

Step-by-step explanation:

The y - intercept is +1

And the rise over run = 3/1 (because 3 is also 3/1)

Pictures are attached.

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

6 0

2 years ago

Read 2 more answers

Please help for 50 points...

vaieri [72.5K]

Answer:

7. ○ ∆ACB ≅ ∆DFE

6. ○ $\displaystyle 43°$

5. ○ $\displaystyle ∠M ≅ ∠S$

4. ○ $\displaystyle octagon$

3. ○ $\displaystyle squares$

2. ○ $\displaystyle rhombus$

1. ○ $\displaystyle equilateral\:triangle$

Step-by-step explanation:

7. Everything is in correspondence with each other, so just follow the pattern in the order the they were originally.

6. All angles correspond with each other, so just follow the pattern.

5. All segments and angles correspond with each other, so just follow their patterns.

4. An octagon has eight sides, a triangle has three sides, a hexagon has six sides, and a pentagon has five sides. With this being stated, you have your answer.

3. In a previous lesson, we confirmed that all squares are rectangles because it is a quadrilateral with four right angles.

2. This is obviously a rhombus because it is a quadrilateral with four congruent angles and sides.

1. An EQUILATERAL TRIANGLE is a regular polygon because they have three congruent angles and sides.

I am joyous to assist you anytime.

4 0

2 years ago

Read 2 more answers

A pyramid with a square base is cut by a plane that is parallel to its base and is 2 units from the base. The surface area of th

icang [17]

Answer:

6.83 units

Step-by-step explanation:

Let the height of the original pyramid be represented by h. Then the cut off top has a height of (h -2). The scale factor for the area is the square of the scale factor for height, so we have ...

(height ratio)^2 = 1/2

((h -2)/h)^2 = 1/2

(h -2)√2 = h . . . . . . square root; multiply by h√2

h(√2 -1) = 2√2 . . . . add 2√2 -h

h = (2√2)/(√2 -1) ≈ 6.8284 . . . units

The altitude of the original pyramid is about 6.83 units.

7 0

1 year ago