The average distance from mars to the sun is about one hundred forty one million six hundred twenty thousands miles how is this distance written standrad form

Solve the equation using the given values: x= -2.5; y= -7.51. 2xy + 2x²

Acollection of coins has value of 64 cents. there are two more nickels than dimes and three times as many pennies as dimes in this collection. how many of each kind of coin are in the collection?

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