The mean is the average. You calculate it by adding all the numbers up in the data set and divide by how many numbers there are in the data set.

So:

$\sf Mean=\dfrac{70+68+72+66+68+69+66+71+74+66}{10}\rightarrow\dfrac{690}{10}\rightarrow\boxed{\sf 69}$

7 0

3 years ago

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How do I do the problem?

Zanzabum

UMMMM you do the problem with the POWER OF DANK MEMES :D:D:D:DD:D:D:D:D:D:D:D:D:D:DD:D:D:D:D:D:D:D:D:D:D:D:D
TROLLOLOLOOLOLOLOOLOLOLOLOLOLOLOLOLOLOLOL

6 0

3 years ago

a parabola has its vertex at 1,1 and passes through the point -2,-2. Find the equation of this parabola

Jet001 [13]

Answer:

The vertex form of the equation is $y = -\frac{1}{3}( x-1)^{2} +1$ .

Step-by-step explanation:

You will use the equation $y=a(x-h)^{2} +k$ to solve this parabola. (h, k) is the vertex. So, we plug this into the equation to get $y= a(x - 1)^{2} +1$ .

Then, we substitute the point as our x and y to get $-2 = 9a+1$ (a lot of simplifying was done here). Then, add 2 to the right side of the equation and isolate the $9a$ to get $9a = 3$ . Finally, divide by 9 on both sides to get $a=\frac{1}{3}$ .

Now, substitute your $a$ back into the equation to get y = $-\frac{1}{3}(x-1)^{2}+1$ .

This is in vertex form. If the answer is needed in standard form, simply distribute and simplify to get $y = -\frac{1}{3} x^{2} +\frac{2}{3} x+\frac{2}{3}$ .

5 0

3 years ago

Carlos bought an item online for $160 and he was charged $8 fee for shipping. What was the percent of the sale was the shipping

prohojiy [21]

Shipping charge was 5%

6 0

3 years ago