Gabrielles age is two times Mikhails age. The sum of their ages is 42. What is Mikhails age?

14

Step-by-step explanation:

If we take Gabrielle's age as 2x and Mikhail's age as x, it equals to 3x. Divide 42 by 3, multiply by 1, you get 14.

b. an equilateral triangle inscribed in a circle

step-by-step explanation:

we are given the figure of two circles having a triangle inside.

now, we know that,

"when a figure is lying inside an another figure, then the outside figure is known as circumscribed figure and the figure lying inside is referred to as the inscribed figure".

as we see that, the circles are containing the triangle completely.

thus, the circles are the circumscribed figures and the triangle is the inscribed figure.

hence, we get, 'an equilateral triangle is inscribed in a circle'.