49 because 140 minus 91 will be 49
The Correct Answer Is 0.5909090909
Answer:
6 mg of the metal needs to be added.
Step-by-step explanation:
Let the amount (in mg) of metal that needs to be added by y.
Therefore, the amount of silver in the above metal is 0.04y.
Prior to mixing, 11 mg of a metal contained 38% of silver (Given).
Therefore, the amount of silver before= 
= 4.18 mg
The total amount of silver after mixing, 4.18 + 0.04y mg
The total amount of metal after mixing, 11 + y mg
New percentage of silver = 26% .
Thus, 
y=6 mg
Therefore, the amount of metal that needs to be added is 6 mg.
Hi there!
The range of a function describes its possible y-values. For example, y=x produces a linear graph. Its range is all real numbers, meaning that for any value of y, the function is defined.
However, for y=x², for example, the range is y>0, since there the graph doesn't travel to y-values less than 0. The function is only defined when y>0.
To find the range of the given functions, you can try graphing them. Or, if you've memorized the ranges of their parent functions, you can try to take that and apply transformations.
Answer for the first question:
f(x)=-√x
The parent function is f(x)=√x. The range of this is y≥0.
f(x)=-√x
Adding a negative in front of the square root reflects the function across the x-axis, meaning the range is therefore flipped too:
y≤0
I hope this helps!
Yes, because it looks like there is a downward pattern in the scatter plot. It appears that the types of energy that have facilities that are more expensive to build are less expensive to operate.
