Answer:
x=7
Step-by-step explanation:
14/28=x/14
x=7
X+ y = 44
x - y = 6
—————
2x = 50
x = 25
y = 44-x = 19
Answer:
84%
Step-by-step explanation:
What we must do is calculate the z value for each value and thus find what percentage each represents and the subtraction would be the percentage between those two values.
We have that z is equal to:
z = (x - m) / (sd)
x is the value to evaluate, m the mean, sd the standard deviation
So for 190000 we have:
z = (190000 - 200000) / (10000)
z = -1
and this value represents 0.1587
for 230000 we have:
z = (230000 - 200000) / (10000)
z = 3
and this value represents 0.9987
we subtract:
0.9987 - 0.1587 = 0.84
Which means that it represents 84% of the houses
5 multiplied by .3 is 1.5
1.5 + 18.5 = 20.
y = 9.25