Square root of 3 over 25

The isosceles triangle has two sides of equal length, a, that sre longer than the length of the base ,b. the equation 2a+b=15.7 can be used to find the sides length. if one of the longer sides is 6.3 centimeters what is the length of the base

An equation of the line tangent to y=x^3+3x^2+2 at its point of inflection is

What is the measure of ac? 5 units 13 units 26 units 39 units 3x- 2b 6x + 9