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
Come on you know this! Don’t give up
Answer:
x=6
Step-by-step explanation:
first we group the 3x-2x
that will give us x(save that we will need it later)
|6+1|-4=10-1
6+1=7
7-4=10-1
(the res of it should be easy for you to do but ill do the rest of it)
10-1=9
7-4=3
x+3=9
9-3=6
<u>X=6</u>