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Amiraneli [1.4K]
3 years ago
7

A researcher wants to determine whether the number of minutes adults spend online per day is related to gender. A random sample

of 315 adults was selected and the results are shown below. Find the expected frequency for the cell E2,2 to determine if there is enough evidence to conclude that the number of minutes spent online per day is related to gender. Round to the nearest tenth if necessary.
Mathematics
1 answer:
lisov135 [29]3 years ago
4 0

Answer:

:P

Step-by-step explanation:

males:180

females:135

are online each day

I doubt i answer correctly but eh.

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The equation of a circle is ( x - 3) 2 + ( y + 2) 2 = 25. The point (8, -2) is on the circle.
Shtirlitz [24]

Answer:

x =8 is the equation of the tangent.

Step-by-step explanation:

Here the equation of the given circle is: (x-3)^{2}  + (y+2)^{2}  = 25

Now, comparing it with the general equation of circle: (x-h)^{2}  + (y -k)^{2}  = r^2

we get the central coordinates (h,k)  = (3,-2)

So, the slope of the line joining center and (8, -2) = \frac{-2 -(-2)}{8-3} = \frac{0}{5} = 0

Since the slope of line = 0, line is parallel to x axis.

Now, as tangent and the line is perpendicular to each other

⇒Slope of the tangent = -1/ slope of the line = \frac{-1}{0}

Now, by point slope formula: the equation of the tangent is

(y-y0)  = m (x-x0)

or, (y +2) = \frac{-1}{0} (x -8)

or x =8 is the equation of the tangent.

8 0
3 years ago
Please help me i dont understand <br> x - 9x + 3 +8x -3
stiv31 [10]

Answer:

Step-by-step explanation:

Collect the like terms!

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4 0
2 years ago
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nikklg [1K]
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3 years ago
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Verizon [17]
The least common multiple between 3 and 4 is 12, so we can use this fact to rewrite both 1/3 and 1/4 in 12ths:

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8 0
3 years ago
Roger's Cafe has usual daily earnings of $800. Today, the cafe earned 120% of the usual daily earnings. How much did they earn t
riadik2000 [5.3K]

Answer:

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Step-by-step explanation:

Over here, I'm going to do it in two ways, and either way works, one is just easier to do out:

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