Astudent is attempting to simplify the express below. sample mathematical work is shows. which statement best applies to the sample mathematical work?

given a+b-2(ab-a), i first apply the distributive property, which yields the expression a+b-2ab+2a. i can then collect like terms: since a+2a=3a, i have the expression 3a+b-2ab as my final answer

a) the student failed to properly apply the distributive property
b) the student collected two or more terms that were not like terms
c) the student failed to collect all like terms
d) the mathematical work shown above is correct

Martha has a deck of cards. she has lost some of the cards, and now the deck only contains nine spades, eleven diamonds, eight clubs, and twelve hearts. martha predicts that whenever she draws a card from the deck without looking, she will draw a club one-fifth of the time. which activity would best allow martha to test her prediction? a. randomly draw a card from the box and see if it is a club. b. randomly draw a card. then, continue to draw another card until all eight clubs are drawn. c. randomly draw and replace a card 120 times. then, observe how close to 30 times a club is drawn. d. randomly draw and replace a card 100 times. then, observe how close to 20 times a club is drawn.

What is the base of the exponential expression of 4 to the power of 5

Equal rights is what a. equlaity b. standards c. sovereignty d. minority rights