What is the possibility of tossing at least 1 tail if you toss 3 coins at once?

7. if the value of x varies directly with the value of y, and x = 3 when y = 21. what is the valu y, and x = 3 when y = 21. what is the value of x when y = 105?

Me with this one question, and i'll upvote the brainliest answer

Are triangles the congruent? write the congruency statement. what is the congruency that proves they are congruent? what is the perimeter of ∆pqr?