Sadly i dont know how to do that
Answer:
N=15
Step-by-step explanation:
Simplify 1/4 (2n-8)
2n-8/4+1/4n=1/2(n+6)
Factor out the common term 2.
2(n-4)/4+1/3n=1/2(n+6)
Simplify 2(n-4)/4 to n-4/2
n-4/2+n/3=1/2(n+6)
Simplify 1/3n to n/3
n-4/2+n/3=1/2(n+6)
Simplify 1/2(n+6) to n+6/2
n-4/2+n/3=n+6/2
Multiply both sides by 6 (the LCM of 2, 3,).
3(n−4)+2n=3(n+6)
7 Expand.
3n−12+2n=3n+18
Simplify 3n-12+2n to 5n-12
5n−12=3n+18
Add 12 to both sides.
5n=3n+18+12
Simplify 3n+18+12 to 3n+30
5n=3n+30
Subtract 3n from both sides.
5n-3n=30
Simplify 5n-3n to 2n.
2n=30
Divide both sides by 22
n= 30/2
Simplify 30/2 to 15.
n=15
n=15
Brainliest
Answer:
z = 2.1784 > 1.96,
Reject the null hypothesis
Step-by-step explanation:
For the males:
n1 = 162, x1 = 63
P1 = x 1/ n1 = 0.3889
For the Females:
n2 = 333,
x2 = 97
P 2 = x2/n2
= 0.2913
P 1= P2 Null hypothesis
P 1 is not equal to P 2 alternative hypothesis
Pooled proportion:
P= (x1 + x2) /( n1+ n2)
= (63 + 97) / (162 + 333)= 0.3232
Test statistics :
Z= (p1 - p2) /√p(1-p)× (1/n1 + 1/n2)
0.3889- 0.2913 / √0.3232 × 0.6768 × (1/162 +1/333)
=2.1784
c) Critical value :
Two tailed critical value, z critical = Norm.S .INV (0.05/2) = 1.960
Reject H o if z < -1.96 or if z > 1.96
d) Decision:
z = 2.1784 > 1.96,
Reject the null hypothesis
Answer: x = 3, y = -6
Step-by-step explanation:
Substitute the y into the equation to get -2x=6x-24
8x=24 so x = 3. Then plug x=3 into the second equation to get y = -6
Answer:
x=2
Step-by-step explanation:
12x^2+5x-4 = 12x^2+6
Subtract 12x^2 from each side
12^x2-12x^2+5x-4 = 12^2x-12x^2+6
5x-4 = 6
Add 4 to each side
5x-4+4 = 6+4
5x = 10
Divide each side by 5
5x/5 = 10/5
x = 2