What is the value of 80-5(x^2-y)+y when x=4 and y=6

Mathematics

1 answer:

egoroff_w [7]3 years ago

8 0

Answer:h

Step-by-step explanation:

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How do you solve this problem 3x+2 (x+4)=x-(x+2)

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Expand the left and the right side .
$3x + 2x + 8 = x - x - 2$
then you simplify
$5x + 8 = - 2$
then continue ...
you will get x = -2

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In the question "Marta’s mother shared a funny video of their cat on the Internet. The total number of people who had viewed the video over the first 30 days could be modeled using the function f(x) = 33(1.3)x where x is the number of days the video has been online. About how many people had viewed the video once it had been online for 20 days?" The correct answer is 6271 because given the function f(x) = 33(1.3)^x where x is the number of days the video has been online. For x = 20 days: f(20) = 33(1.3)^20 = 33(190.0496377) = <span>6,271</span>

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Write an equation for a circle with a diameter that has endpoints at (–3, –2) and (7, –6). Round to the nearest tenth if necessa

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The standard form for the equation of a circle is :

(x−h)^2+(y−k)^2=r2 ----------- EQ(1)

where handk are the x and y coordinates of the center of the circle and r is the radius.

The center of the circle is the midpoint of the diameter.

So the midpoint of the diameter with endpoints at (−3,-2)and(7,-6) is :

((−3+7)/2,(-2+(-6))/2)=(2,-4)

So the point (2,-4) is the center of the circle.