Which of the following is a rational number?

OA.

B.

568

OC. √21

D.

121

For the data in the table, does y vary directly with x? If it does write an equation for the direct? x y 2 10 4 24 6 36

A tree that is 50 feet tall casts a shadow that is 60 feet long. Find the angle of elevation to the nearest degree of the sun

Serena is cycling from a dance class to her home the equation shows Serena's distance (y) in miles from her home after x minutes Y=16-6x What does the number 16 in the equation represent

Solve for w - w+160=259

1 more than two-thirds of a is b

What is the value of the expression? (15 - 7) • (3 + 5) A. 12 B. 29 C. 64 D. 41

Find the area of the circle when C = π/6. Give your answer in terms of π.

What is the solution to the system of equations? 4x-8y=-16 x-2y=-8 a. Use the substitution method to justify that the given system of equations has no solution. b. What do you know about the two lines in this system of equations?

Of the items manufactured by a certain process, 20% are defective. Of the defective items, 60% can be repaired. a. Find the probability that a randomly chosen item is defective and cannot be repaired. b.

Find the value of x. (2x + 30°