Algebra the length of the base of an isosceles triangle is x. the length of a leg is 2x  5. the perimeter of the triangle is 20. find x.
know
1. what is the perimeter of a triangle?
2. what is an isosceles triangle?
need
3. what are the sides of an isosceles triangle called?
4. how many of each type of side are there?
5. the lengths of the base and one leg are given. what is the third side of the
plan
6. write an expression for the length of the third side.
7. write an equation for the perimeter of this isosceles triangle.
8. solve the equation for x. show your work.

divide by 5

step-by-step explanation:

60/5 = 12

answer: 7

step-by-step explanation:

step-by-step explanation:

the solution of the equation is 2.23 ⇒ answer b

step-by-step explanation:

* lets revise the meaning of exponential function

- the form of the exponential function is y = ab^x, where a ≠ 0, b > 0 ,  

  b ≠ 1, and x is any real number

- it has a constant base b

- it has a variable exponent x

- to solve an exponential equation, take the log or ln of both sides,  

  and solve for the variable

* lets solve the problem

∵

- the base is 7 and the exponent is x

- insert ㏑ in both sides

∴

- use the rule

∴ x ㏑(7) = ㏑(77)

- to find x divide both sides by ㏑(7)

∴

* the solution of the equation is 2.23 to the nearest 2 decimal places