Error: They subtracted 9x from both sides when they should have subtracted 12. You can’t subtract unlike terms
Correct: x=-5/16
Subtract 12 from both sides to get -5 on the left and add 7x and 9x to get 16x. Divide both sides by 16 to isolate x.
Answer:
10rupee notes are 11
20rupee notes are 22
Step-by-step explanation:
Let 10-rupee note be x
20-rupee note will be x + 11
The equation will be
10x + 20(x + 11) = 550
10x + 20x + 220 = 550
30x = 330
x = 330/30 = 11 = 10rupee notes
y = 11+11 = 22 = 20rupee notes
The tax is 3.60, the total is 51.60
Answer:
Power of test = 0.1
Step-by-step explanation:
The value of power of function is called Power of test. The Power function of testing hypothesis would be defined as the probability of rejecting H₀ while H₀ is false.
Power of test is denoted as 1-β which is expressed as P(x ∈ W I Ha)
in our case P(x ≥ 0, Hₐ)
Under Hₐ μ = 13.8 then we know that, Z = {x - E(x)}/(σ/√n)
where x = 13.88, σ, 0.25, n = 16, Hₐ μ= 13.8 = E(x) [x.....Normal distribution]
Z = (13.88 - 13.8)/((0.25)/(√16)) = 1.28
Therefore 1-β = P(z ≥ 1.28) = 0.5 - 0.3997 = 0.1, (from z table values)
hence, the power of our test when μ = 13.8 is 0.1
Answer:
Step-by-step explanation:
