Find f(-4)??pls amd thanks

1

Step-by-step explanation:

All you have to do is plug -4 into each of the x's in this equation.

2(-4)^2+3(-4)-19 =1

step-by-step explanation:

there is a formula i can give you:

it is r^2*n*sin(360/n) divided by 2 where r represents the "radius" and n is the number of sides.

plug them in:

(10sqrt(3))^2*6*sin(360/6) divided by 2

100*3*6*sin(60) divided by 2

900*sin(60)

900*sqrt(3)/2

450*sqrt(3)

approx is 779.4 cm^2

step-by-step explanation:

what does 'mandy have ben 780 bottle caps. ' mean?