The empirical rule states that in a normal distribution,
68% of data is within 1 std deviation of the mean
95% of data is within 2 std deviation of the mean
99.7% of data is within 3 std deviation of the mean
In this case 95% of the cases would be within two std deviations of the mean
mean - 8 and mean + 8
72 - 8 = 64 and 72 + 8 = 80
then 95% of the scores are between 64% and 80% on the test.
The answer is c, -1 or -7
Hope this helped :)
Answer
668 + 232 ones = 900
or
668 + 23 tens + 2 ones = 900
or
668 + 2 hundreds + 32 ones = 900
or
668 + 2 hundreds + 3 tens + 2 ones.
<u>Explanations</u>
900 - 668 = 232. Meaning we can add 232 ones to 668 to get 900.
232-200 = 32 ⇒ Meaning, we can add 2 hundreds and 32 ones to 668 to get 900.
32-30 = 2. This means we can add 2 hundreds, 3 tens and 2 ones to 668 to get 900.
900 - 668 = 232
1 and .20 can be your answer i guess.
Answer:
Area = Length × width
16 = (3x +2 ) × ( x)
16 = 3x² +2x
3x² +2x -16=0
( 3x+8 ) ( x -2 ) =0
3x +8=0 —> 3x = – 8 —> x = – 8/3 —> x = – 2.6
x-2=0 —> x = 2
I hope I helped you^_^
