Answer:
The player answer correctly 30 questions
Step-by-step explanation:
First we have to develop the information that gives us as 2 equations
x = correct answer
y = incorrect answer
z = score = 40
h = total answer = 50
2x - y = z x + y = h
2x - y = 40 x + y = 50
we clear the x of one equation and replace the value of x in the other equation
x = 50 - y
2x - y = 40
2(50 - y) - y = 40
100 - 2y - y = 40
-3y = 40 -100
y = -60/-3
y = 20
x = 50 - y
x = 50 - 20
x = 30
Answer:
c and d
Step-by-step explanation:
About 20% I would say. Hope I helped, please award brainliest!
Answer:
11918
Step-by-step explanation:
well plug em eqaul to each other to get x = 156
156 + 12 = 178
156 squared - 144 = 24192
24192 - 356 = 23836
divide by two =
Answer:
F=10
Step-by-step explanation:
