Answer:
Step-by-step explanation:
(12+10+x)/3=15
15*3=12+10+x
45-12-20=x
X=23
The standard deviation is the square root of the variance
so if the variance is 196, then the standard deviation is the sqrt of 196, which is 14
Answer:
21-2x
Step-by-step explanation:
11-2(x-5)
11-2x+10
21-2x
not completely sure if im right... if i am can you mark me brainliest
Answer:
35.71m/s²
Step-by-step explanation:
using the formula force(F)=mass(m)×acceleration(a)
a =

F=15.0N
m=0.42kg
a=?
a=15÷0.42
a=35.71m/s²
Answer:
it is option 3
Step-by-step explanation:
-4(5p+3)
by opening brackets, you get
-20p -12