Where does that StartFraction ... mess come from? -- I've seen it in other questions.
Comparing that to the general quadratic formula
we see b=-10 (agreeing in both places) a=7 (two places), c=-2
Answer: 7x² - 10x - 2 = 0
Riley and Jace work at a dry cleaners ironing shirts. Riley can iron 25 shirts per hour, and Jace can iron 30 shirts per hour. R
1 answer:
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Answer:
The amount in the account is $3062.4 (Approx) and compound interest is $162.4 .
Step-by-step explanation:
Formula for compounded semiannually
Where P is the principle , r is the rate in decimal form and t is the time.
As given
Michael arthur deported $2,900 in a new regular savings account that earns 5.5 percent interest .
Here
Principle = $2,900
5.5% is written in the decimal form.
= 0.055
Time = 1 year
Put in the formula
Amount = $ 3062.4 (Approx)
Thus the amount after 1 years is $3062.4 (Approx) .
Now find out the compound interest .
Amount = Principle + Compound interest
Here
Amount = $ 3062.4
Principle = $2,900
Put in the above
$3062.4 = $2,900 + Compound interest
Compound interest = $3062.4 - $2,900
Compound interest = $162.4
Answer:
a) The value of the sample mean is 50
b) (38.02, 61.98) is the 95% as it covers more values than the other.
Step-by-step explanation:
a) Upper and lower values for the confidence intervals are at the same distance from the mean, as they represent an upper and lower limit for the value, and the most probable value is the one in the middle, which, in a normal distribution is the mean.
As they derive from the same data, both pairs of values should give us the same mean:
b) The percentage of the confidence interval tells us which is the area below the bell curve (of the normal distribution) between the limits given.
One could give a value with a 100% CI, but limits should be minus and plus infinity, and as the interval gets smaller, less values are covered (less area), and less certain we are about our value being inside the interval.
Then, we can say that the widest interval must be the 95% CI, i.e. (38.02, 61.98).
we have
Group terms that contain the same variable, and move the constant to the opposite side of the equation
Factor the leading coefficient
----------> the value of A is
Complete the square. Remember to balance the equation by adding the same constants to each side
Rewrite as perfect squares
therefore
the answer is
the value of A is