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kaheart [24]
3 years ago
12

A circle has an area of 81

Mathematics
1 answer:
Gre4nikov [31]3 years ago
4 0

Answer: The answer I got was about 31.9.

Step-by-step explanation:

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consider the line 4x+9y=-8find the equation of the line that is perpendicular to this line and passes through the point (-2, -2)
levacccp [35]
\begin{gathered} \text{The equation of the line is,} \\ 4x+9y=-8 \\ 9y=-4x-8 \\ y=-\frac{4}{9}x-\frac{8}{9} \\ \text{The slope is}\Rightarrow m=-\frac{4}{9} \\ perpendicular\text{ slope}\Rightarrow m^{\prime}=\frac{9}{4} \\ 1. \\ x_1=-2,y_1=-2 \\ So,\text{ the perpendicular equation of line is} \\ y-y_1=m^{\prime}(x-x_1) \\ y+2=\frac{9}{4}(x+2) \\ 4y+8=9x+18 \\ 4y=9x+10 \\ y=\frac{9}{4}x+\frac{5}{2}(\text{Ans)} \\ 2. \\ The\text{ parallel equation is,} \\ y-y_1=m(x-x_1) \\ y+2=-\frac{4}{9}(x+2) \\ 9y+18=-4x-8 \\ 9y=-4x-26 \\ y=-\frac{4}{9}x-\frac{26}{9}(\text{Ans)} \end{gathered}

8 0
1 year ago
Which type of data is best represented by a bar graph? A. changes in data over time B. parts of a total amount C. data sets with
lesantik [10]
D

Bar graphs are used for comparisons! :)
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3 years ago
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If f(x) = 5x + 40, what is f(x) when x = -5? og O 8 O 7 O 15​
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Answer:

15.

Step-by-step explanation:

5 * - 5 + 40 = 15

8 0
3 years ago
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What does r equal in 4r+5=3r
vekshin1
4r+5=3r can also be written
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