Answer:
x=2
Step-by-step explanation:
3x+1=x+5
Subtract x from each side to get all the variables on one side
3x-x+1=x-x+5
2x+1 = 5
Subtract 1 from each side to get all the constants on the other side
2x+1-1 = 5-1
2x= 4
Divide each side by 2
2x/2 =4/2
x =2
The answer is 5/7 because if 2/7 is with the red marble then the res would be against the red marble and that is 5/7
Please mark brainliest.
Let us say that the samples for fifty movies is 1 and
samples for thirty five is 2. To solve the test statistic z, we can use the
formula:
z = (p1 – p2) / sqrt [p (1 – p) (1 / n1 + 1 / n2)]
Where,
p1 = is the proportion for sample 1 = 0.36
p2 = is the proportion for sample 2 = 0.23
n1 = number of samples = 50
n2 = number of samples = 35
while p can be calculated using the formula:
p = [p1 * n1 / (n1 + n2)] + [p2 * n2 / (n1 + n2)]
p = [0.36 * 50 / (50 + 35)] + [0.23 * 35 / (50 + 35)]
p = 0.211764705 + 0.094705882
p = 0.306470587
Going back for the calculation of z:
z = (0.36 – 0.23) / sqrt [0.306 (1 – 0.306) (1 / 50 + 1 /
35)]
z = 1.279
Therefore the nearest answer is:
z = 1.29
