Answer: x = 7, y = -3
<u>Step-by-step explanation:</u>
3y = 26 - 5x --> added 5x to both sides to get: 5x + 3y = 26
Elimination method (I am going to eliminate "x":
5x + 3y = 26 → 6(5x + 3y = 26) → 30x + 18y = 156
6x + 7y = 21 → -5(6x + 7y = 21) → <u> -30x - 35y</u> =<u> -105</u>
-17y = 51
<u> ÷-17 </u> <u>÷-17</u>
y = -3
Now, input y = -3 into one of the original equations to solve for "x":
3y = 26 - 5x
3(-3) = 26 - 5x
-9 = 26 - 5x
-9 -26 = -5x
-35 = -5x
7 = x
For calculating this, you have to divide 250 from 250,000
=250,000/250 = 1000
So, it is 1000 times larger.
The rule is::
- 68% of data are in the range mean +/- 1*standard deviation
- 95% of data are in the range mean +/- 2*standard deviation
<span>- 99.7% of data are in the range mean +/- 3*standard deviation
Here mean is 68 and standard deviation is 9.
Score 77 is 68 + 9, which is mean + 1 standard deviation.
Then, the difference 100% - 68% = 32% is the % of data out of the range. Of those, diven the symmetry of the normal distribution, half will be above the range, this is 16% of scores are above 77.
</span>
Answer:
0.2655
Step-by-step explanation:
Multiply 8.85 by 3. Then Divide it by 100.
You will get the dividend of 0.2655.
