Answer:
x + 3 = 0.
Step-by-step explanation:
One would be:
x + 3 = 0 Subtract 3 from both sides:
x + 3 - 3 = 0 - 3
x = -3
Step-by-step explanation:
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When you factor this quadratic (or any polynomial, for that matter), what you get are the zeros of the function. When the object is on the ground, its height is 0. The zeros of a function are where the graph goes through the x-axis. Where the graph goes through the x-axis, the y value is 0. Using the quadratic formula to factor this gives you zeros of t = -1 and t = 7. The two things in math that will never EVER be negative are time and distance/length, so we know that object will hit the ground 7 seconds after it is thrown.
<h2>
Answer with explanation:</h2>
As per given , we have
n= 64
a) Since , the sample mean is the point estimate for the population mean.
Therefore, the point estimate of the population mean =
b) Critical z-value for 99% confidence : 
Confidence interval :
Hence, the 99 percent confidence interval for the population mean is between 7.46 and 8.88.
Subtract 1 from both sides. You'll end up with x = 2 (answer)
