When y=3. which expression is equivalent to 5y-7y

multi choice

a. 2y

b. -12y

c.-2y

d. 12y

Step-by-step explanation:

5y-7y=-2y=-2(3)=-6

answer: 5 17/33 % (to the tenth)

step-by-step explanation:

he guessed: 34.5 pounds

actual weight is 32.7

there for he is off:

34.5 -32.7 = 1.8

32.7 is the 100%

1.8 represents %? of 32.7

therefore:

32.7   - 100%

1.8     -     x%

x= 1.8*100%/32.7% = 18*100%/327%

x=1800%/327%   = (5 165/327)%

to the tenth:

5 17/33 %

the answer for the second equation is (4,0)