Answer:
The Original length of the wire is 61.1 cm.
Step-by-step explanation:
Given:
Now it has been given that the above equation can be used to find the original length in centimeters of a wire before it was cut.
Also We need to find the original length of the wire.
From above equation we can say that;
l ⇒ Original length of the wire.
On Solving the above equation we get;
Now we will add both side by 12.5 using addition property of equality.
Hence the Original length of the wire is 61.1 cm.
Answer:
$3,919.77
Step-by-step explanation:
I've taken this quiz already. It is a: $3,919.77
Answer:
Step-by-step explanation:
Given
Required
Solve
We have:
Rationalize
Apply difference of two squares on the denominator
Divide common factor (5)
Expand the numerator
Answer:
Explanation:
The <em>average</em> is the mean. It is calculated adding all the values and dividing the sum by the number of values (data):
For the students who took the test the day before you, you can write:
Where n is the number of students who took the test first.
Thus, when the average was 69 the equation is:
When you take the test, the n + 1, the new average is 70, and the sum of the scores raised in 95 points:
Now you have a system of two equation and two unknowns, so you can solve it.
Clear the sum of the scores from the first equation:
Subsitute in the second equation:
Solve for n:
Thus, when you include your self the number of students who took the test was 25 + 1 = 26.