Four students provide the following approximations for 0.89.
anyah states that _0.89 is between 0.44 and 0.45 because 0.44< < 0.45.
matthew states that v0.89 is between 0 and 1 because i < 0.89 < 1.
rhoda states that 0.89 is between 0.9 and 1.0 because 0.92 0.89 < 1.02.
ming states that v0.89 is between 0.93 and 0.95 because (0.93)2 < 0.89 < (0.95)2.

on friday there were 15 birds

a 4/6 = 9/12   not proportional

step-by-step explanation:

to find which are not proportional, we can use cross products

if it is true, they are proportional.   if it is not true, they are not proportional.

a 4/6 = 9/12

4* 12 = 6*9

48 = 54

not this is not proportional  

b 2/3 = 12/18  

2* 18 = 3 * 12

36 = 36

this is proportional

c 5/4 = 10/8  

5*8 = 4*10

40 = 40

this is proportional

d 7/5 = 35/25

7*25 = 5 * 35

175 = 175

is proportional

answer: 4 (:

step-by-step explanation:

if y=4x then you will substitute 4x in for y in the second equation.

8x + 4x = 18 combine like terms

12x = 18 divide by 12 on both sides

x = 18/12 or 3/2

now replace x in the first equation with 3/2 to get

y = 4 3/2

y = 6

the answer is a

(3/2,6)

hope that .

brainliest is always apprectiated