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joy3449
24.06.2020 •
Mathematics
Help asap. I am confused please put the answer
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Ответ:
17.6706
Step-by-step explanation:
we know that in a rectangle triangle we can apply the Pythagorean theorem
so![x^2=256+56.25=312.25\\](/tpl/images/0693/2189/56c8a.png)
Ответ:
Im translating this to english, hope this is not a problem for you :)
"El cuadrado de un número menos 5 es igual a 220. ¿Cuál es ese número?"
This says that a number square subtracted by 5 is equal to 220:
n^2 - 5 = 220
now we need to isolate n:
n^2 = 225
n = √225 = 15
then our number is 15.
"El cuadrado de un número mas el mismo número es igual a 306. ¿Cuál es ese número?"
The sum betwen a squared number and the same number is equal to 306, and we want to find this number:
n^2 + n = 306
this is a cuadratic equation, here we can use Bhaskara:
n^2 + n - 306 = 0
if we have a equation of the form:
the solutions are:
in this case; a = 1, b= 1 and c = 306, we can replace this in the equation and get:
So we have two solutions here; n = -36/2 = - 18 and n = 34/2 = 17