(-10+2)= -8 -8-1= -9 The answer is c
We can start with "All real number," then we eliminate certain value what would cause zero in denominator;
Here, we have denominator of √(2x+8)
We need to exclude value of x from real number such that √(2x+8) = 0 So solve for x here;
√(2x+8) = 0
[√(2x+8) ]² = 0²
2x+8 = 0
2x = -8
x = -4
So we cannot have x to be -4, otherwise denominator would be zero.
So exclude -4 from "All real number"
Now we have domain of (-∞, -4) U (-4, ∞) or All real number; x ≠ -4.
Answer:
9%
Step-by-step explanation:
Let the required number be 100.
Now, according to the question, the number is first increased by 30 %
⇒ 100 + 30 % of 100
⇒ 100 + [(30*100)/100]
⇒ 100 + 30
⇒ 130
Then, it is decreased by 30 %
⇒ 130 - (30 % of 130)
⇒ 130 - [(30*130)/100]
⇒ 130 - 39
⇒ 91
Net Decrease = 100 - 91
= 9
Percent Decrease = (Change in number*100)/100
⇒ (9*100)/100
= 9 %
Answer: hypotenuse is 37
Step-by-step explanation: