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.
Answer:
There is not enough info to be able to answer this question properly.
Step-by-step explanation:
To determine the slope, you can use the following formula:
(y2-y1)/(x2-x1)
I wanna say 10 or ether -10 since if it was subtracted from 2 then it would equal -8
Answer:
Option 2
Step-by-step explanation:
First distribute 5r to 2r and 4 to get 10r^2+20r
Then distribute 8 to 2r and 4 to get 16r+32
After that you combine the like terms, so combine 20r and 16r to get 36r
Since there aren't other like terms for 10^2 and 32 you leave them how they are
After you combine your like terms you write the terms in order to get 10r^2+36r+32
Hope this helped!
