Given δabc, ab = bc = ac . area of δabc = 25 sqrt 3/4 cm. find the perimeter of δabc.

The perimeter of triangle ABC is 15 cm

Step-by-step explanation:

we know that

An equilateral triangle has three equal sides and and three equal interior angles (each angle measure 60 degrees)

In this problem

Triangle ABC is an equilateral triangle

Because

AB=BC=AC

The area of a equilateral triangle (applying the law of sines) is equal to

where

b is the length side of the equilateral triangle

we have that

substitute

simplify

Find the perimeter of triangle ABC

The perimeter is equal to

substitute the value of b

fahrenheit

step-by-step explanation:

fahrenheit is more precise than celsius. the ambient temperature on most of the inhabited world ranges from -20 degrees fahrenheit to 110 degrees fahrenheit—a 130-degree range. on the celsius scale, that range is from -28.8 degrees to 43.3 degrees—a 72.1-degree range. this means that you can get a more exact measurement of the air temperature using fahrenheit because it uses almost twice the scale.

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