MATHEMATICS HIGH SCHOOL

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I need help with this question ( see image). Please - 1

Answers

Answer 1
Answer:

Answer:

#4

2.50 out of 15 is:

  • 2.50/15*100% = 16.67%

#5

  • Salary = 9600
  • Increase = 1680

Percent increase:

  • 1680/9600*100% = 17.5%

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A 3x4x5 rectangular cuboid (e.g. a brick) is painted blue and cut into 1x1 cubes. what is the expected value for the painted sides of a randomly selected cube?

Answers

Answer:

8 cubes are painted on 3 sides

24 cubes are painted on 2 sides

22 cubes are painted on 1 sides

6 cubes are painted on 0 side

E = 3 * 8/60 + 2 * 24/60 + 1 * 22/60 + 0 * 6/60 = 47/30 = 1.567

There are a total of 20 lions, tigers and bears. If the number of tigers is 2 more than the number of lions and the number of bears is 1 more than the number of tigers, find the number of each.

Answers

Number of tiguers: x + 2
Number of Lions:  x
Number of bears:(x+2)+1=(x+3)

We can suggest this equation:
(x+2) + (x)+(x+3)=20

3x+5=20
3x=20-5
3x=15
x=15/3
x=5.

Therefore:
Number of tiguers: x + 2=5+2=7
Number of Lions:  x=5
Number of bears:(x+2)+1=(x+3)=5+3=8.

Answer: there are 7 tiguers, 5 lions and 8 bears.

Final answer:

In the problem, if we denote the number of lions as x, the number of tigers as x+2, and the number of bears as x+3, and considering that the total of all these animals is exactly 20, we can form and solve a simple algebraic equation. We will find that there are 5 lions, 7 tigers, and 8 bears.

Explanation:

This is a problem of simple algebra. According to the problem, let's represent the number of lions as x, the total number of tigers as x + 2 (since it's two more than the lions), and the number of bears as x + 3 (1 more than the number of tigers).

The problem states the total number of all these animals as 20, so we can set up the following equation: x + x + 2 + x + 3 = 20.

Solving this algebra equation gives you:

3x + 5 = 20

Subtracting 5 from both sides gives us:

3x = 15

Dividing both sides by 3 gives us:

x = 5

So, the number of lions is 5, the number of tigers is 7 (5 + 2), and the number of bears is 8 (7 + 1).

Learn more about Algebra here:

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A randomly generated list of numbers from 0 to 4 is being used to simulate an event, with the numbers 3 and 4 representing a success. What is the estimated probability of a success?

Answers

Answer:

40%

Step-by-step explanation:

a.p.e.x
2/4=1/2 because 3 and 4 are 2 of four numbers

Draw a set of objects where you can find a fractional part of the group using the total number of objects by using subgroups

Answers

Answer:

Draw 20 equilateral triangles such that 5 triangles having sides measure 4 cm , 7 triangles have sides measure 7 cm , 3 triangles have side 10 cm and rest of the triangles have side of measure 5 cm.

This will become a set of equilateral triangles .

Let consider a subgroup set of the original set of having equilateral triangle with side-length of 5 cm.

Then the number of triangle having side-length 5 cm= 20-5-7-3=5

Now, the fraction of the group having triangle with side- length 5 cm is given  by:-

\frac{\text{triangle having side-length 5 cm}}{\text{total triangle}}=(5)/(20)=(1)/(4)
We divide the total set into several sub-sets (subgroups) that contain the exact same number of members. This way we know the number of total members by adding the number of total subsets.

Which of the following is equivalent to 1/3(6x-12y) ?A.2x - 4y


B.2x + 4y


C.2x - 12y


D.6x - 12y

Answers

1/3(6x-12y)
2x - 4y

the answer is A

Over what axis was the square reflected in the first example?

Answers

Answer:

theres no picture attached

Step-by-step explanation:
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