Convenience. She just asked whoever she saw.
Simple random sampling. There was no sort of grouping or anything involved, and they tell you random numbers were used.
121 of 162 said yes, so the experimental probability is 121/162
4055 * 121/162 = 3028.73... = 3029 people.
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You want to isolate one of the variables (x or y) so you can plug it into the other equation. The easiest one is isolating the 2nd equation.
3x² - 16x + 13 - y = 0 Add y on both sides
3x² - 16x + 13 = y
You can use this and plug it into the first equation
y - 12x + 15 = 3x²
(3x² - 16x + 13) - 12x + 15 = 3x²
3x² - 16x + 13 - 12x + 15 = 3x² Combine like terms
3x² - 28x + 28 = 3x² Subtract 3x² on both sides
-28x + 28 = 0 Add 28x on both sides
28 = 28x Divide 28 on both sides
1 = x
Now that you know x, you can plug it into either of the equation to find y
3(1)² - 16(1) + 13 - y = 0
3 - 16 + 13 - y = 0
-y = 0 Divide -1 on both sides
y = 0
x = 1, y = 0
Answer:
58
Step-by-step explanation:
Basically, your equation will look like this
2W=272-(78+78)
2W=272-156
2W=116
but now you have to divide by 2
W=58
Answer:
loss of $12,481.38
Step-by-step explanation:
It is usually a good idea to follow directions. (See attached.)
The sum of the three profit values is -$12,481.38, indicating a loss in the 3-year period.
