Aconstruction worker is making concrete by mixing sand, gravel, and cement in water. for each pound of sand, he uses 1 2/3 pounds of gravel. for each pound of gravel, he uses 2/5 pound of cement. he is making enough concrete that he needs to use 3 pounds of sand. how many pounds of cement does he use? a. 1 pound b. 1 4/15 pounds c. 2 pounds d. 2 1/15 pounds

700 miles the train takes 5 hours to a travel the distance at what unit rate is the train traveling?

How can writing phrases as algebraic expressions you solve problems?

Which of the following would be a correct step in proving that triangle abc is congruent to triangle cda? a. use a protractor to measure the angles and show that all the corresponding angles are equal in measure. this will allow you to prove congruence by aaa. b. show that segment ab is parallel to segment cd and segment ad is parallel to segment cb. this will allow you to prove congruency by asa. c. show that is segment ab is perpendicular to segment ad. this will allow you to prove congruence by sas. d. none of the above.