First, write an equation system based on the problem
An equation for "the perimeter of a rectangle is 70 in" can be written as following
∴ 2l + 2w = 70 <em>(first equation)</em>
An equation for "the length is 11 in more than its width" can be written as following
∴ l = w + 11 <em>(second equation)</em>
Second, solve the equation by substitution method o find the dimension of the rectangle.
Substitute/plug l as (w+11) into the first equation
2l + 2w = 70
2(w + 11) + 2w = 70
2w + 22 + 2w = 70
4w + 22 = 70
4w = 70 - 22
4w = 48
w = 48/4
w = 12
The width of the rectangle is 12 in
Substitute w with 12 to the second equation
l = w + 11
l = 12 + 11
l = 23
The length of the rectangle is 23 in
Third, find the area of the rectangle
a = l × w
a = 23 × 12
a = 276
The area of the rectangle is 276 in²
Answer:
(- 10, - 9 )
Step-by-step explanation:
Substitute x = - 10 into f(x)
f(- 10) = 2(- 10) + 11 = - 20 + 11 = - 9
Thus the solution is (- 10, - 9 )
Answer:
yes
Step-by-step explanation:
Answer:
Step-by-step explanation:
Minimum Amount = circumference of the pond.
Formulas
C = pi * d
Givens
pi = 3.14
d = 30 feet
Solution
C = pi*d Substitute for the givens.
C = 3.14 * 30 Multiply
C = 94.2