Question

QUESTION 10

Answer 1

Answer:

• See below

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.

We can reflect this as:

• x + x - 10 + x - 20 = 258

Solving we get:

• 3x - 30 = 258
• 3x = 258 + 30
• 3x = 288
• x = 288/3
• x = 96

The scores are: 96, 86 and 76

Answer 2

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).