1.) Simplify completely x2-4x4 over x2+10x+25 times x+5 over x2+3x-10

A. x-2/x+5
B. x-2/(x+5)^2
C. (x-2)^2/x+5
D. (x-2)^2/(x+5)^2

2.) simplify completely x^2+4x-5 over 5x^2-8x+3 times 20x-12 over x^2-6x-55

A. 4/x+5
B. 4(x-1)/x+5
C. 4/x-11
D. 4(x+5)/x-11

3.) Simplify completely 40v^2/35v^4 divided by 20v^3/5v

A. 2/7v^4
B. 7/32
C. 7v^4/2
D. 32/7

4.) Simplify completely 8x-56 over x^2-49 divided by x-6 over x^2+11x+28

A. 4(x+4)/x-3
B. 8(x+2)/x-3
C. 8(x+4)/x-7
D. 8(x+4)/x-6

5.) Simplify completely x^2+x-12 over x^2-x-20 divided by 3x^2-24x+45 over 12x^2-48x-60

A. X-5/4(x+1)
B. X+1/8(x-5)
C. 4(x+1)/x-5
D. 8(x-5)/x+1

could you give more information?

x = 17

step-by-step explanation:

in the given figure, two triangles are inscribed in a circle where ∠bae ≅ ∠dae which makes the side be and de equal so we can write it as:

3x - 24 = x + 10

solving this equation for x to get:

3x - x = 10 + 24

2x = 34

x = 34/2

x = 17

therefore, the value of x = 17.

introduction, methodology, results, discussion

step-by-step explanation:

an observational study is one which consists of actual observation to record data and then analyse the data.

there are a number of factors that should be analyzed before starting an observational study.

the main four factors are:

i) introduction:   this should be analysed to check whether the purpose of the study is correctly established and the data recorded are appropriate for the study

methodology:   the method of collecting the data, such as whether randomly selected, and whether sample size matches with the population to be studied, whether questions asked are easy to answer by common men, etc.

results: then results such as summary of data with comments should be studied thoroughly

discussion:   the last is the discussion, this can be either by management people or persons who are all interested , etc.