x is less than or equal to -4 or x is greater than or equal to 5
x <= -4 or x>= 5
There is no intersection of both inequalities when we graph it in number line So, we write the interval notation separately for each inequality
for x<=-4 , x starts at -4 and goes to -infinity because we have less than symbol. Also we have = sign so we use square brackets
Interval notation is (-∞ , -4]
for x>= 5 , x starts at 5 and goes to infinity because we have greater than symbol. Also we have = sign so we use square bracket at 5
Interval notation is [5 , ∞)
Now combine both notation by a 'U' symbol Union
(-∞ , -4] U [5 , ∞)
Answer:
Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O
Step-by-step explanation:
Is it H2O2 on the right side and HBr2 on the left side?
Then there is no solution.
I think the formula must look like
Ca(OH)2 + HBr = CaBr2 + H2O
You have 2 Br on the right side then it must be 2 HBr on the left side.
Ca(OH)2 + 2 HBr = CaBr2 + H2O
You have 4 Hs and 2 Os on the left side then it must be 2 H2O on the right side.
Ca(OH)2 + 2 HBr = CaBr2 + 2 H2O
Now everything looks fine.
-5 degrees Fahrenheit, total means they were added together. That means that the first step to finding an average was done. We divide by 3 to do the 2nd and final step of finding an average
Answer:
The equation of the parabola is 
, whose real vertex is 
, not 
.
Step-by-step explanation:
A parabola is a second order polynomial. By Fundamental Theorem of Algebra we know that a second order polynomial can be formed when three distinct points are known. From statement we have the following information:
, 
, 
From definition of second order polynomial and the three points described above, we have the following system of linear equations:
(1)
(2)
(3)
The solution of this system is: 
, 
, . Hence, the equation of the parabola is . Lastly, we must check if belongs to the function. If we know that 
, then the value of 
is:
does not belong to the function, the real point is .
Answer:
50%
Step-by-step explanation:
50% aaaaaa.................
