Answer:
15.90
Step-by-step explanation:
The formula for standard deviation, σ, of a population is
We can use a table to organize the calculations.
<u> x </u> <u>x - µ </u> <u>(x - µ)²
</u>
212 -18 324
249 19 361
212 -18 324
248 18 324
239 9 81
212 -18 324
216 -14 196
234 4 16
<u> 248 18 324</u>
2070 2274
Sum= 2070
N = 9
µ = Sum/N = 2070/9 = 230
Answer:
therefore reece'sis 16 years old
Step-by-step explanation:
18+p=34
p+18-18=34-18
p=16
Answer:
2nd option
Step-by-step explanation:
Given
3x³ - 15x² - 4x + 20
step 1 ( group the first/second and third/fourth terms )
(3x³ - 15x² ) + (- 4x + 20)
step 2 ( factor each group )
3x² (x - 5) - 4(x - 5) ← note factor of - 4 ( not + 4 )
step 3 ( factor out (x - 5) from each term )
(x - 5)(3x² - 4)
I wanna say the 1st or the last one
