Answer:
Step-by-step explanation: add the equations
2x² = 30
x² = 15
y² = 12 - 15
= -3
x4 -y4 = 15² - (-3)²
= 216
The 15th percentile (area below which 15 % of cases lie in a standard normal distribution is, from tables -1.04
<span>z=(x-mean)/sd </span>
<span>-1.04 = (x-100)/15 </span>
<span>x=100+15(-1.04) =84.4</span>
Answer:
f(x)=4x
Step-by-step explanation:
Let's look at the progression of f(x) values as the x value goes up. The x value goes up in steps of 1, but the f(x) value goes up in steps of 4. This means that the f(x) value grows 4 times faster than the x value. Comparing them side by side, you can see that each f(x) value is indeed 4 times larger than the corresponding x value. Therefore, the descriptive function is f(x)=4x.
Answer:78.909899
Step-by-step explanation:
90.09