Answer:
B
Step-by-step explanation:
<STR = <SRT Given the markings of the triangle
<STR + <STU = 180 Supplementary angles
(2x - 9) + 7x = 180 Remove the brackets
2x - 9 + 7x = 180 Combine
9x - 9 = 180 Add 9 to both sides
9x = 180 + 9 Combine
9x = 189 Divide by 9
9x/9 = 189/9
x = 21
What are we supposed to solved X or Y, what kind of answer need be for specific please
Answer:
Step-by-step explanation:

Step 1: Subtract 4 form both sides
Step 2: Multiply both sides by (-3). when we are multiplying by (-3) the < will change to >.

Answer:
Step-by-step explanation:
Amount of water in tank 1 = amount of water in tank 2
30t +25 = -20t + 1000
Add 20t to both sides
30t + 20t + 25 = -20t + 20t + 1000
50t + 25 = 1000
Subtract 25 from both sides
50t + 25 - 25 = 1000 - 25
50t = 975
Divide both sides by 50
t = 975/50 = 39/2

t = 19 minutes 30 seconds
After 19 1/2 minutes both tanks will have 610 liters of water
Answer:
one dozen: 12 servings
four dozens: 12x4 so 48 servings
Step-by-step explanation:
Assuming one cookie is one serving a dozen would be 12 so 12 servings per dozen.