Answer: −12y+30z
Step-by-step explanation:
5(-3y+3z)-3(-5z-y) Expand by distributing terms.
−15y+15z−3(−5z−y) Expand by distributing terms.
−15y+15z−(−15z−3y) Remove Parentheses
−15y+15z+15z+3y Collect like terms & Simplify
(−15y+3y)+(15z+15z)
=−12y+30z
Hope this helps, now you know the answer and how to do it. HAVE A BLESSED AND WONDERFUL DAY! :-)
- Cutiepatutie ☺❀❤
Answer:
1
Step-by-step explanation:
Given the question above :
The probability distribution :
X : ___ 1 ___ 2 ___ 3 ___ 4 ____ 5
P(x): _ 0.1 __ 0.1 __ 0.6 _ 0.1 __ 0.1
The Variance : Var(X) = (Σx²*p(x)) - μ²
μ = E(X) = Σ(X * p(x)) :
Σ(X * p(x)) = (1*0.1)+(2*0.1)+(3*0.6)+(4*0.1)+(5*0.1)
μ = 3
Var(X): [(1^2*0.1)+(2^2*0.1)+(3^2*0.6)+(4^2*0.1)+(5^2*0.1)] - 3²
= 10 - 9
= 1
Hence. Variance = 1
Answer:
He/she took 48minutes to wash
