What is the estimated sum? round each number to the nearest hundred before adding.

521,370 + 26,839

a.547,000

b.548,000

c.548,100

d.548,200

If t17 = 3 (t5) in an arithmetic progression, find t1 in terms of d.

How many solutions does the nonlinear system of equations graphed below have? a. one b. zero c. four d. two

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.