Lesson check (4.0a. a.2)
1. sari has 3 times as many pencil erasers as
sam. together, they have 28 erasers. how
many erasers does sari have?

Let x be how many erasers Sari has and y be for Sam's.

x = 3y

x + y = 28

y = 28 - x

x = 3(28 - x)

x = 84 - 3x

4x = 84

x = 21

Sari has 21 erasers

32

step-by-step explanation:

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