Answer:
Area = (a² -5a) in²
Perimeter = (4a -10) in
Step-by-step explanation:
Let the length of the rectangle be a.
Given that, its width is 5 in less than the length.
So,
length ⇒ a
width ⇒ (a - 5)
First, let's find the area of the rectangle.
Area = length × width
Area = a ( a - 5 )
<em>Solve the brackets.</em>
Area = <u>(a² -5a) in²</u>
<u />
Now, let us find the perimeter of the rectangle.
Perimeter = 2 ( l + w )
Perimeter = 2 ( a + a - 5 )
Perimeter = 2 ( 2a - 5 )
Perimeter = <u>(4a -10) in</u>
Answer:
let the number be X
Step-by-step explanation:
(x - 9)/4 = 5
or. x - 9 = 5 × 4
or. x = 20 + 9
x = 29
Hey there!
To find percent error, we find the difference between the prediction and the actual value. We take that difference, divide it by the prediction, and multiply it by 100.
So let's find the difference.
42 - 30 = 12
Divide the difference, which is 12, by 30.
12 ÷ 30 = 0.4
Multiply this by 100 to get the percent.
0.4 x 100 = 40
The percent error is 40%.
Hope this helps!
Answer:
(12, 3)
Step-by-step explanation:
To answer this, we find the midpoint of the line segment (that is, of the diameter) connecting (6, -4) and (18, 10):
The formula for the midpoint gives us x-midpoint = (6+18)/2, or x-midpoint = 12.
The formula for the midpoint gives us y-midpoint = (-4+10)/2, or x-midpoint = (6)/2 = 3.
Thus, the center of this circle is at (x-midpoint), y-midpoint), or (12, 3).
The third answer choice is the correct one.
