doll1234
22.03.2021 •
Mathematics
Select the correct answer. Find the solution(s) for x in the equation below.
x2-9x+20=0
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Ответ:
Step-by-step explanation:
Given
x² - 9x + 20 = 0
x² - ( 4 + 5) x + 20 = 0
x² - 4x - 5x + 20 = 0
x ( x - 4 ) - 5 (x - 4 ) = 0
(x - 4 ) ( x - 5 ) = 0
Either
x - 4 =0
x = 4
or
x - 5 =0
x = 5
x = 4 and 5
Hope it will help :)
Ответ:
hope this helps. Check out the image.. and can u give me brainliest pls and I also have explanation
Step-by-step explanation:
Ответ:
12.4%
Step-by-step explanation:
The results from the random sample counts 124 from a total of 1000 people that wear contact lenses. This means is the percentageof the people in the sample that wear contact lenses.Because it is a random sample, it is suppose to reflect the behavior of the total population. Then we can expect or predict similar percentage of Americans wearing contact lenses (12.4%).