Step-by-step explanation:
x+2y = 10 ...1
-x+y = 2 ...2
...1 + ...2
x+2y+(-x+y) = 10 + 2
3y = 12
y = 12/3
= 4
Replace y = 4 in ...1
x + 2(4) = 10
x + 8 = 10
x = 10 - 8
= 2
(x,y) = (2,4)
Answer:
B 3.78 seconds
Step-by-step explanation:
On the graph, the line ends when it hits (0,3.78) This means that the object was in the air for 3.78 seconds before hitting the ground (0 height)
Answer:
180-43
Step-by-step explanation:
43 and x are supplementary which means they both should equal 180
Answer:
7 1/10 , 7.108 , 57/8 , 7.79
Step-by-step explanation:
7/10 = 7.1
57/8 = 7.125
Answer:
7/12
Step-by-step explanation:
-15/9+9/4
We need to make them have the same denominator:
9x4= 36 so that is our new denominator
-15x4= -60
9x9=81
(Sorry if i dont make sense)
Now we have -60/36+81/36 which is equal to 21/36.
Now we simplify:
21/36=7/12
