If your trying to solve for x it’s 40, x=40
2 times 1/2x =2x20
x=2x20
x=40
Answer:
c
Step-by-step explanation:
im a math genius
This is a direct variation, since the cost and the number of articles purchases both go up.
Answer:
x=81
y=99
z= 129
Step-by-step explanation:
the 3 angles of a triangle add to 180 degrees
51 + 48 + x = 180
99 + x = 180
subtract 99 from each side
99 + x -99 = 180 -99
x = 81
x+y = 180 they make a straight line
81+ y = 180
subtract 81 from each side
y = 180-81
y = 99
z+ 51 = 180 they make a straight line
subtract 51 from each side
z+51-51 = 180 -51
z = 129
