Answer:
Teacher's age is 32.
Step-by-step explanation:
How you count the average age for people is:
(age of person 1 + age of person 2 ... ) / number of people = average age
Let's start by observing that we've got 2 equations coming from the text:
- average of just students
20 students x 11 (average for a student) = sum of age of students
20 x 11 = 220 - average of student and teacher
let's say x is age of teacher
together students & teacher is 20 + 1 = 21 people
(20 students x 11 + x)/ (20 + 1) = 12
(220 + x) / 21 = 12
220 + x = 12 * 21
x = 12 *21 - 220
x = 252 - 220
x = 32
hope this helps ❣️
Hello from MrBillDoesMath!
Answer: f(g(t)) = t
Discussion:
A function and its inverse "undo" each other. Suppose that
f(t) = t^2 and g(t) = t^ (1/2)
Then
A B C
g(f(t)) = g (t^2) = (t^2) ^ (1/2) = t
A: substitute the definition of f(t), that is t^2, in the equation
B: g(t) takes the square root if its argument
C: The square root of a squared item is the item itself.
Regards, MrB
Answer:
Mean: 39 Median: 32.5 Range: 62
Step-by-step explanation:
First, you organize the numbers from least to greatest, so 10 15 19 46 72 72. The median is the middle number, so the average of 19 and 46( 32.5). The Range is the largest number minus the smallest number, so 62. and the mean is all the numbers added up, then divided by the amount of numbers, so 234/6 or 39.
Consider the number 226981 since...
the units digit of 226981 is 1,
the units digit of its cube root is
also 1.
Now, the number obtained by striking out units, tens and hundred digits = 226.
=> 3. 3
<h2> 6. <226 <7 </h2>
tens digit of the cube root of 226981 is
<h2> 6</h2>
hence, 3._________
\/ 226981. =6
for more information
<h2>link/84016...</h2>
Answer:
A
Step-by-step explanation:
Cause 4 times 4divide by 4 is is 1 so 1/4
