4x (2+8) = (5 x 2)+(_9) what is the blank?

Step-by-step explanation:

Perform the indicated multiplication:

4(2 + 8) = 10 + ?

Then:

4(10) = 10 + ?

? must be 30.  

Please ensure that you have copied down this problem exactly as it was originally presented.

3432532

step-by-step explanation:

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'.