Answer:
<h2>w² - 2(w)(1) + 1² = w² - 2w + 1 = (w - 1)²</h2>
Step-by-step explanation:
(a - b)² = a² - 2ab + b²
We have
w² - 2w = w² - 2(w)(1)
We must add 1²
w² - 2(w)(1) + 1² = (w - 1)²
Answer:
2 am
Step-by-step explanation:
It takes 1 hour to pour the cement. We will be done at 8 pm
It will take 6 hours to set at 70 degrees
8+6 hours = 14
But we circle around at 12
14-12 =2
The cement will be set at 2
Answer:
x = 10 1/8 | y = 40 1/2. | z= 30 3/8
Step-by-step explanation:
x + y + z = 81
4x = y
3x = z
x + 4x + 3x = 81
8× = 81
÷8. ÷8
x = 10 1/8
4x = y
(10 1/8) (4) = y
40 1/2 = y
3x = z
(3) (10 1/8) = z
30 3/8 = z
Answer:
(1,-1), (5,-4), (2,-6)
Step-by-step explanation:
Took the test, this was the given answer.
Answer:
E(X) = 0.64
Sd(X) = 0.933
Step-by-step explanation:
3(0.07) + 2(0.11) + 1(0.21)
E(X²) = 3²(0.07) + 2²(0.11) + 1²(0.21)
= 1.28
Var(X) = 1.28 - 0.64² = 0.8704
Sd = 0.933