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mixer [17]
3 years ago
9

Math work questions help

Mathematics
1 answer:
dedylja [7]3 years ago
6 0
Well maybe we could help if u show what the question is
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If y = x3 + 3x2 + 5, what is dy/dx
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We need to find the derivative of that equation with respect to x.  The derivative of x^3 is 3x^2, the derivative of 3x^2 is 6x, and the derivative of any constant is always 0.  Use the power rule for derivatives that says \frac{dy}{dx}( x^{n})=n*x ^{n-1}.  Our derivative, then, is 3x^2+6x.
6 0
4 years ago
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A man on the fifth floor of a building shouts down to a person on the street. If the angle of elevation from the street to the m
White raven [17]
The correct answer is 57 feet.
4 0
3 years ago
How do you find the equation for the line that is parallel to the line y=2/3x-7 and passes through the point (3,-1)
Debora [2.8K]

parallel lines have the same exact slope hmmm what's the slope of y = 2/3x-7 anyway? well, low and behold, is already in slope-intercept form, therefore

\bf \stackrel{\textit{slope-intercept form}}{y=\stackrel{slope}{\cfrac{2}{3}}x-7}.


so we're really looking for the equation of a line whose slope is 2/3, and runs through 3, -1.


\bf (\stackrel{x_1}{3}~,~\stackrel{y_1}{-1})~\hspace{7em} slope =  m\implies \cfrac{2}{3} \\\\\\ \stackrel{\textit{point-slope form}}{y- y_1= m(x- x_1)}\implies y-(-1)=\cfrac{2}{3}(x-3) \\\\\\ y+1=\cfrac{2}{3}x-2\implies y=\cfrac{2}{3}x-3

3 0
3 years ago
How would you graph the solution to x/3 ≤ -2?​
Kaylis [27]

Answer:

x ≤ -6

Step-by-step explanation:

8 0
3 years ago
The annual rainfall for two cities, Albany and Zachary, in each of the years from 2002 to 2011 are shown in the tables. Annual R
Masteriza [31]

Answer:

On average, Albani gets 20.933 inches of rain per year.

On average, Zachary gets 24.734 inches of rain per year.

On average, Zachary gets more rain than Albani.

Step-by-step explanation:

Mean is given by:

Mean = \frac{Sum}{Total}

For Albani :

Sum of total number of terms = 23.36+18.51+28.54+22.36+30.50+24.74+11.93+15.34+18.07+15.98

Sum of total number of terms = 209.33

Number of terms = 10

Mean=\frac{209.33}{10}\\\\Mean=20.933\\

For Zachary :

Sum of total number of terms = 27.27+20.11+31.14+25.88+32.97+25.03+18.55+23.91+22.75+19.73

Sum of total number of terms = 247.34

Number of terms = 10

Mean=\frac{247.34}{10}\\Mean=24.734

7 0
3 years ago
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