To solve this, we use the z test.
The formula:
z = (x – u) / s
where x is sample value = 20, u is the mean = 15, and s is
the standard deviation = 2.5
z = (20 – 15) / 2.5
z = 2
Since we are looking for values greater than 20, this is
right tailed test. We use the standard distribution tables to find for P.
P = 0.0228
Therefore:
number of students = 100 * 0.0228 = 2.28
<span>2 to 3 students will get greater than 20 measurement</span>
This question doesnt make sense u need to attach a picture
<span><span>1. <span>x =(8-√76)/2=4-√ 19 = -0.359 </span>
</span><span> <span>
2. x =(8+√76)/2=4+√ 19 = 8.359 </span>
</span></span>
The equation would be x+5*-2=6.
The result of that equation would be x=16
Answer:
26
Step-by-step explanation:
DE+EF=DF
Subsitue thise x values for DE, and DF
12+x=38
=26
