How many different 4-digit personal identification numbers (pins) can be made from the digit 0 through 9 if no digits repeat?

What is the missing reason in the proof? segment addition congruent segments theorem transitive property of equality subtraction property of equality?

What is the best estimate of the length of a football

In terms of x, find an expression that represents the area of the shaded region. the outer square has side lengths of (x+5) and the inner square has side lengths of (x-2), as shown. area: a1 x + a2 square units submit