My percentage for mathematics last term was 85%. If my scores out of 20 marks for the first nine tests were 14, 18, 16, 16, 18, 15, 16, 20 and 19, find my score for the last test out of 20 marks. help me please! with full solution

my solution is
let x be the last test score
133+x/20=85%

answer: the answer is 23

step-by-step explanation:

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step-by-step explanation:

welll its a very hard question but ill

step-by-step explanation:

first you take the 6 dollars and add 10 to it then add the 50 to that then multiply by 8 with xy and your answer will be

hope this