Answer:
The new mean for the exam scores is 51
Step-by-step explanation:
the mean can be calculated using the formula
mean of scores = 
before the 20 points was added, the mean of the score was = 50.
Inserting this into the formula, we have:
50 = 
from this, we can compute the sum total of the scores as
sum total = 50 × 20 = 1000
when the extra 20 marks is added, the sum of the entire scores will be changed to 1000 + 20 = 1020.
Hence the new mean will be computed as (New Sum total of scores / Number of students)
= 
= 51.
∴ The new mean of the scores is = 51
Hi , the answer is 15 miles per hour because 45 divided by 3 equals 15 , one hour equals to 15 , two hours =30 and three hours =45 , it goes by 15.
Answer:
the solution is (-4, 2)
Step-by-step explanation:
6x + 8y = -8
x + 4y = 4
... can be solved using elimination by addition and subtraction, among other methods. Multiply the second equation by -2 to obtain
6x + 8y = -8
-2x - 8y = -8
Combining these results in
4x = -16. Thus, x = -4.
Substituting -4 for x in x + 4y = 4 results in
-4 + 4y = 4, or 4y = 8, or y = 2
Then the solution is (-4, 2)
Answer:
- The Range is the set of all outputs for a function
- The Domain is the set of all inputs for a function
For example
Here Domain and range both are set of all real numbers
Answer:
$172.80
Step-by-step explanation:
$160.00 x 1.08=$172.80
