Answer:
Test statistic = 1.664
Step-by-step explanation:
The hypothesis :
H0 : μ = 47.2
H1 : μ ≠ 47.2
Given that :
Sample mean, xbar = 47
Sample size, n = 250
Standard deviation, σ = 1.9
The test statistic :
(xbar - μ) ÷ (σ/√(n))
T = (47 - 47.2) ÷ (1.9/√(250))
T = (0.2 / 0.1201665)
Test statistic = 1.664
I hope this helps you
1)
x= -2y
2. (-2y)+4y=0
0=0
2)
x+2x= -3
x=-1
y= -2
3)
7x+2x+2=4
9x=2
x=2/9
y=2/9+1
y=11/9
Answer:
D
Step-by-step explanation:
Answer:
9 Quarters, 3 dimes
Step-by-step explanation:
$2.00 = 8 quarters
25cents = 1 quarter
$2 + 25 cents = $2.25
2.55 - 2.25 = .30
30cents = 3 dimes.
Hope this is right.
There were many ways to do this. But this is 1 way.
soooo ya...
