Answer:
B
Step-by-step explanation:
Given
x² + 14x = 51
To complete the square
add ( half the coefficient of the x- term )² to both sides
x² + 2(7)x + 49 = 51 + 49 , that is
(x + 7)² = 100 ( take the square root of both sides )
x + 7 = ± = ± 10 ( subtract 7 from both sides )
x = - 7 ± 10
Thus
x = - 7 - 10 = - 17
x = - 7 + 10 = 3
3-y=8
-y=8-3
y=-5
so just try to re arrange the equation to find the value for the variable
To solve this problem you would add 3 and 7 together to get 10. Next you would divide 150 by 10 to get 15. After you have done that you would multiply 7 by 15 to get 105. There will be 105 pencils sold.
I think its x=-1................
Answer:Mean = 258.44
Median=248
Mode=209&248
Mid-range=329.5
Step-by-step explanation:
Mean=
sum of all numbers/number of occurrence
(450 +243 +227 +248 +248 +291 +278 +228 +241 +209 +265+ 234 +209 +257 +252 +255)/16=258.44
Median= the middle number when arranged in accending or defending order=248
209 209 227 228 234 241 243 248 248 252 255 257 265 278 291 450
Since there 2 middle numbers (248 248) the median will be the mean of both which is (248+248)/2
Mode= highest occuring number
( since there 2 numbers occurring the most) this is a Bi-mode =209 and 248.
Mid range= (highest+ lowest)/2
(450+209)/2
=329.5