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Vilka [71]
3 years ago
12

School

Mathematics
1 answer:
bearhunter [10]3 years ago
7 0
The soft shell tacos cost a dollar and the hard shell cost three dollars so in algorithm 3x2 equals 6 plus 6x1 equals 12 combined. So the hard shell cost 3$’s while the soft shell cost 3$’s
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Suppose we want a 90% confidence interval for the average amount spent on entertainment (movies, concerts, dates, etc.) by fresh
katovenus [111]

Answer:

609

Step-by-step explanation:

Standard deviation = \sigma = $30

Margin of error = E = $2

Confidence level = 90%

Since the distribution is said to be normal, we will use z scores to solve this problem.

The z score for 90% confidence level = z = 1.645

Sample size= n = ?

The formula to calculate the margin of error is:

E=z\frac{\sigma}{\sqrt{n}}\\\\\sqrt{n}=z\frac{\sigma}{E}\\\\n=(\frac{z\sigma}{E} )^{2}

Using the values in above equation, we get:

n=(\frac{1.645 \times 30}{2} )^{2}\\\\ n = 608.9

This means, the minimum number of observations required is 609

6 0
3 years ago
the formula F=1.8C+32 compares temperatures in degrees Celsius C, to temperatures in degrees Fahrenheit F. Find four ordered pai
blondinia [14]
Just plug stuff in 

(0, 32)
(100, 212)
(-20, -4)
(10, 50)
6 0
3 years ago
Helpppsppspspspspsp plssss
matrenka [14]

Answer: About 804.25

Step-by-step explanation:

Do the inverse of the circumference formula and then take the radius and put it into the formula for the area of a circle

7 0
3 years ago
Write <img src="https://tex.z-dn.net/?f=%28-%20x%5E%7B2%7D%29%20-4x%2B2" id="TexFormula1" title="(- x^{2}) -4x+2" alt="(- x^{2})
marin [14]
Because the coefficient of x^2 is -1, we know that a will be -1.  Knowing that the coefficient of x is -4, we can calculate that p=2.  Thus, we have -1(x+2)^2+q is our equation.  This is equal to -x^2-4x-4+q.  As the constant term must be 2, we can then see that q is 6.

As such, we have -1(x+2)^2+6=0 as our factorization.

To solve this equation, we can use the quadratic formula.  Plugging in values, we have:

\frac{4+-2 \sqrt{6} }{-2}
which is equal to: (when the fraction is simplified)
-2+- \sqrt{6}
7 0
3 years ago
Will mark Brainliest!
Anettt [7]

Answer:a=2.1 :)

Step-by-step explanation:a+(-1.6)=-3.7

+1.6 +1.6

a=-2.1

5 0
3 years ago
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