What is the value of k in the following question:

x^2 + kx + 9 = 0

The volume of a sphere with radius r is 4 3 πr 3. what is the volume of a sphere with radius 5

5 There is a bag filled with 3 blue and 4 red marbles. A marble is taken at random from the bag, the colour is noted and then it is not replaced. Another marble is taken at random. What is the probability of getting 2 blues?

If two triangles are similar, which pair of conditions must be true?

At a certain middle school, every home room teacher is assigned 28 students. there are 3 teachers that do not have a homeroom. is the number of students at this school proportional to the number of teachers?

F (x) = 1/3x4x^ How do I find F (4)

Which number is a common factor of 32, 48. and 80? 12 10 8 9

Angle 1 and angle 2 are complementary angles. The measure of angle 1 is 30 degrees. The measure of angle 2 is 4x degrees. Find the value of x.

How many centimeters are equivalent to 5 feet? (12 in = 1 ft)

5 13/20 as a decimal

Factor out the largest term possible (Show work) -18a^2 m^5 + 12a^4 m^3