I REALLY Need help ASAP

A

Step-by-step explanation:

In order to multiply a whole number by a fraction, you can write the whole number in fraction form. -12 can also be written as    .

Now you can write out      ×    

Multiply the numerators by each other and the denominators by each other to create one fraction.

-12 × 20 = -240     and 1 × 21 = 21

   ×   =      and now you can simplify the fraction by finding the greatest common factor of the denominator and numerator.   -240 and 21 have the greatest common factor of 3. Divide each side by 3 and get the fraction -80/7

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'.