Pls help me it detects if it’s right or wrong

At school there are 526 students and 263 are girls about how likely is it that a randomly chosen student will be a boy

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

Solve this equation using substitution. {4x + y = −2} {4x + 6y = 44}