Answer:
It is an Observational study. The population of interest is fifth-grade boys and girls in your school district.
Step-by-step explanation:
Consider the provided information.
Observational study is the study in which observer only observe the subjects, and measure variables of interest without allocating treatments to subjects.
Experiment study is the study in which the researchers are applying treatments to experimental units in the research, then the effect of the treatments on the experimental units is observed.
Now consider the provided survey.
Here, students are randomly selected form the population of fifth-grade boys and girls.
The aim of the study is to observe the subjects and no treatment was administered to the students.
Thus. it is an Observational study.
The population of interest is fifth-grade boys and girls in your school district.
The study is to observe who is faster fifth-grade boys or fifth-grade girls at solving Ken-Ken puzzles.
Set it up like this: 2<em>n</em>+3 <<em> n</em>-4
Solve for <em>n</em>:
2<em>n</em>+3 < <em>n</em>-4
-<em>n</em> -<em>n</em> (1st step: get <em>n</em> on one side by itself)
<em>n</em>+3 < -4
-3 -3 (2nd step: subtract 3 from both sides)
<em>n</em> < -7
The answer is n < -7
Answer:
A) The sum is 25 × 26
Step-by-step explanation:
In the attached table we notice a pattern.
For the first positive pair number the sum is
For the first two positive pairs, the sum is
For the first three positive pairs, the sum is .
So:
For the first number of positive pairs, the sum of them is:
If , and then, the sum of the first 25 positive even numbers is:
The correct answer is option A
Answer:
x=1
Step-by-step explanation:
3^x +1
f(x)=3x+1
f(x) =g(x)
3x +1 =3^x +1
Subtract 1 from each side
3x = 3^x
Let x =1
3*1 = 3^1
3=3
Answer: There are no solutions