Answer:
28. 120 degrees
29. 30 degrees
30. 56 degrees & 124 degrees
31. 72 degrees, 108 degrees, and 18 degrees
Step-by-step explanation:
We assign variable x for the answer we are looking for (28-29).
28.
Supplement means x + y = 180 degrees. We also know x = 2y. Substitution gives us 3y = 180 degrees, so y = 60 degrees and x = 120 degrees.
29.
Complement means x + y = 90 degrees. We are given 2x = y. Substitution brings us 3x = 90 degrees, x = 30 degrees.
30.
Supplement means x + y = 180 degrees. We are told that y = 2x + 12, so we substitute. This gives 3x + 12 = 180 degrees, x = 56 degrees. Substituting that back into the equation for y, we get 124 degrees.
31.
Supplement means x + y = 180 degrees. Complement means x + z = 90 degrees. Using our given info, we know y = 6z. We can substitute that in to get x + 6z = 180. Subtracting our second and third equations, we get 5z = 90, z = 18 degrees. Therefore, x = 72 degrees, y = 108 degrees.
It takes 3 minutes to fill 60L, so it takes 1 hour to fill 1200L.
So fill out the coordinate with those given numbers, and count how far apart they are and you will get your answer. Then times it by x.
Answer:
-0.08
Step-by-step explanation:
Multiply.
-0.2
x 0.4
_____
0 0 8
Each number you started out with has 1 space between the last number and the decimal, so your final answer will have 2 spaces.
Also, since you multiplied a negative and a positive, your final answer will be negative.