2 answers:
Answer:
Step-by-step explanation:
Let the first test score is x, then the next two are x - 10 and x - 20 and the total of three is 258.
<u>We can reflect this as:</u>
- x + x - 10 + x - 20 = 258
<u>Solving we get:</u>
- 3x - 30 = 258
- 3x = 258 + 30
- 3x = 288
- x = 288/3
- x = 96
<u>The scores are:</u> 96, 86 and 76
Answer:
let the grade points be a,b,c
a+b+c=258
b=c+10( since she noticed that on tests two and three,she scored 10 points fewer).
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Do you think you can send a picture of the problem I’m not really understanding
