Which of the following situations cannot be modeled with the equation 2x + y = 0? A. It takes 2 parts of chemical A to neutralize 1 part of chemical B.
B. Tony must pull twice as hard as Ralph just to sit still in a match of tug-o-war.
C. If Sophie earns twice as many points as penalties, she will break even.
D. Tom's Saturday shift was twice as long as his 2 hour Sunday shift.

a.

step-by-step explanation:

step 1 distribute 2 to every term in the parentheses

step 2 add 10 on both sides of the equal sign

set each factor equal to 0

4x-3 = 0

2x-1 = 0

solve for x.

4x-3=0

4x=3

x= 3/4

solve for x. 

2x-1= 0

2x= 1

x= 1/2

your answer should be 1/2 is less than or equal to x and 3/4 is greater than or equal to x

$15 each

step-by-step explanation:

$45/3 children= $15 each

i think its a and d

step-by-step explanation: