Answer:
30
Step-by-step explanation:
A player answers x correct questions and y incorrect questions for a total of 40 questions.
x + y = 40
The score is obtained by subtracting y incorrect answers from two times the x of correct answers. The player's score is 50.
2x - y = 50
Use substitution to solve. Rearrange the first equation so that it is equal to y. Then, substitute the y-value into the second equation.
x + y = 40
y = 40 - x
2x - y = 50
2x - (40 - x) = 50
2x - 40 + x = 50
3x - 40 = 50
3x = 90
x = 30
Since x was made to represent correct answers, the player had 30 correct answers.
9514 1404 393
Answer:
Step-by-step explanation:
Add or subtract multiples of 360° to find coterminal angles.
<u>Positive</u>
75° +360° = 435°
75° +2×360° = 795°
<u>Negative</u>
75° -360° = -285°
75° -2×360° = -645°
Answer:$7.98
Step-by-step explanation:
$19.95 divided by 2.5 yards
19.98/2.5 =7.98
Answer:
15
Step-by-step explanation:
graph shows
postcards=15
shirts=10
pencils= 40
we're going to add postcards and shirts THEN comparing it to pencils
postcards and shirts=15+10= 25
pencils= 40
answer=40-25=15
Answer: Rational
Step-by-step explanation: Only numbers that go on infinitely like pi or the square root of 7 are irrational
