4:6 x:18
Lets solve for x
Cross multiply
4*18 = 72
6*x = 6x
6x = 72
6x/6 = 72/6
x = 12
Answer: x = 12
Absolute value can never be negative!
|-30| = 30
|-4 | = 4
| 5 | = 5
30 - 4 + 5 =
26 + 5 = 31
Hope this helped!
Answer:
Step-by-step explanation:
If I remember you have to multiply the numbers you have and you get the answer.
Answer:
0.8914
Step-by-step explanation:
You want to find the z-values associated with the x-values:
z = (x -μ)/σ
z1 = (57 -90)/12 = -2.75
z2 = (105 -90)/12 = 1.25
Look up these values in a probability table and find the difference of the table values.
p(z < z1) ≈ 0.00298 . . . . from a table or calculator
p(z < z2) ≈ 0.89435 . . . . from a table or calculator
p(57 < x < 105) ≈ 0.89435 -0.00298 = 0.89137 ≈ 0.8914
