There are 21 students in a classroom with 8
tables. if 2 students can sit at a table, how
many students can sit down at tables?

a. 21

b. 17

c. 8

d. 16

need asap!

the answer is D

Okay so they are 8 tables and if 2 students can sit at a table how many students can sit down at tables

8*2=16

step-by-step explanation:

the ratio of red paint to blue paint is always 9/7. that means that, whatever x's value, (4x+12)/(4x-4) has that same ratio. so, set up an equation and cross-multiply to solve for x:

9/7 = (4x+12)/(4x-4)

9(4x-4) = 7(4x+12)

36x - 36 = 28x + 84

8x - 36 = 84

8x = 120

x = 15

13664

step-by-step explanation:

=cross multiply

=100 x = 13664