Apair of pants costs twice as much as a shirt. the total cost of 1 pair of pants and 1 shirt is $18. if s represents the cost of 1 shirt, which equation could you use to find the cost of 1 shirt?

For this case we propose a system of equations:

p: Variable representing the cost of a pair of pants

s: Variable representing the cost of a shirt

A pair of pants costs twice as much as a shirt, means:

The total cost of 1 pair of pants and 1 shirt is $ 18:

We substitute the first equation in the second:

The following equation can be used:

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'.