For each problem, define the variable, give the inequality solve the inequality and label your answer. Show work

1.Tammys long-distance phone service charges $0.09 for each minute. How long can she talk on one phone call if she does not want to spend more than $3.50 on a call?

What is the value of the digit 1 in the number 13?

If two angles of a triangle have equal measures and the third angle measures 90°, what are the angle measures of the triangle? a. 60°, 60°, 60° b. 45°, 90°, 90° c. 30°, 30°, 90° d. 45°, 45°, 90°

Will mark determine whether the conjecture is true or false. give a counterexample for any false conjecture. given: points r, s, and t conjecture: r, s, and t are coplanar. a) false; the points do not have to be in a straight line. b) true c) false; the points to not have to form right angles. d) false; one point may not be between the other two.