The average rate of change is ...
... (change in f(x))/(change in x)
... = (f(10) - f(2))/(10 - 2)
... = (10.24 - 0.04)/8 = 10.2/8 = 1.275
Answer:
3750$
Step-by-step explanation:
Let x be the amount in dollars of sales:
125 + 0.08x = 200 + 0.06x (when Ethan and Sam earn the same weekly income)
0.02x = 75
x = 3750
Evaluate the function at the three values of the range and see what you get. The appropriate choice is ...
... D) {15, 3, 0}
_____
Evaluation can sometimes be simpler if you rearrange the function to a form called "Horner's form."
... f(x) = (x -4)x +3
Then the evaluation looks like (for x=-2) ...
... f(-2) = (-2-4)(-2)+3 = (-6)(-2) +3 = 12 +3 = 15
This is sufficient to identify D as the answer of choice.
7x+8y=19
-6x -8y=18
--------------- <em>Add both equations</em>
x = 37
Using x = 37 in the first equation:
7(37)+8y=19
259+8y = 19
8y = 19 - 259
8y = -240
y = -240/8
<h3>y = -30</h3>
Answer:
A
Step-by-step explanation: