An equilateral triangle has a perimeter of 21 and a side length of 2x - 3. solve for x

In any triangle, Perimeter (P) = a + b + c, where, a, b and c are the sides  and P is the perimeter of the triangle

In case of equilateral triangle, the length of all sides are equal. Therefore,

P = a + a + a = 3a

Here, a = (2x - 3) and P = 21

or, 21 = 3 (2x - 3)

or, 7 = 2x - 3

or, 2x = 10

or, x = 5

7 ft 6 in means 7 1/2, because 6 in is 1/2 of a foot. 7 ft 8 in means 7 2/3 because 8 in is 2/3 of a foot. 23/3 = 7 2/3. 15/2 = 7 1/2.

23/3   *   15/2   = 57 1/2

step-by-step explanation:

shift 4 units up, and 1 unit left.

it will translate f(x) = 3^x to g(x) = 3^(x+1) + 4