Question

Please help me get 13 question

Answer 1

Answer:

90 correct answers, 100 wrong or un-attempt

Step-by-step explanation:

x = correct  y= wrong or un-attempt

x+y = 180     y = 180 -x

4x + 1(180 -x) = 450

3x =270

x = 90

y = 100

Answer 2

hey mate here is your answer

let

x= correct answer, y= unattempted or wrong answers

x+y=180 so y=180-x

put y value in

4x+y=450

4x+(180-x)=450

3x=270

x=90

hope it may help you

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