Answer:
18: 3/4
19: 5/8
20: 1/2
21: 9/10
22: 2/3
23: 5/6
24: 4/9
25: 2/7
26: 3/4
27: 7/10
28: 4/5 (I'm in a rush, so make sure to double check the answers)
I am guessing the answer is both
x=-0.834252 or x=0.134252
Answer:
the terms are 6x, -3y, and -6
Step-by-step explanation:
Domik weights 30 pounds more than his sister
Together they weigh 330 pounds
Let "x" represent the weight of Dominik's sister, then his weight can be expressed as "x+30"
And their total weight can be calculated as:

From this expression you can calculate the value of x:

x=150 pounds
x+30=150+30=180 pounds
Dominik weights 180pounds and his sister 150 pounds