Mr. davis has 15 students in his class. he wants to send 3 of his students to pick up books for the class. how many different combinations of students can he choose?
a. 45
b. 2730
c. 455
d. 210

Two and nine tenthsfifty and thirty-two hundredths four and 16 thousandthsseven hundred twelve and 8 hundredths

If that's an answer

1. use commutative property to reorder the terms.2x+81=0.2. move the constant to right side by adding its opposite on both sides. 2x+81-81=0-81.2x=(-81).3. divide the equation on both sides.2x ÷ 2 = 81 ÷ 2.x = -81/2. your answer is -81/2. if you need to simplify it into a decimal, it’s -40.5.