The area of the parallelogram is 65 square miles. Find it’s base and height. x-4 , x+4

base = b = 5

height = h = 13

Step-by-step explanation:

Given Data:

Area of Parallelogram = A = 65

base = b = x -4

height = h = x+4

Formula:

A = b×h

Solution:

A = b×h

65 = (x-4)×(x+4)

65 =                               ∴ (a-b)(a+b) =

65 =

= 65 + 16

= 81

Now,

base = b = x -4 = 9-4

base = b = 5

height = h = x+4 = 9+4

height = h = 13

x = -3

y = -18

step-by-step explanation:

to solve by substitution, substitute one variable and solve for the other. then substitute again to find the remaining variable.

x-1/3(3x-9) = -3 since y=3x-9 substittute y.

x-1/3(3x-9)=-3

x + x +3 = -3

2x+3=-3

2x+3-3= -3-3

2x=-6

x=-3

substitute again into y=3x-9

y=3(-3)-9

y=-9-9

y=-18

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )