Which quadrilateral always has diagonals that are congruent but not necessarily perpendicular?

a) parallelogram

b) rectangle

c) rhombus

d) square

The sum of three numbers is 129. The third number is 4 times the first. The first number is 9 less than the second. What are the numbers?

How to change a mix number into a improper fraction

Ashley ran from home to school in 10 minutes. What is her average speed, if the distance between her house and her school is 1.5 miles?

Find the solutions of the equation that are in the interval [0, 2π). (enter your answers as a comma-separated list. if there is no solution, enter no solution.) cot2 θ + cot θ = 0

What are all the real zeroes of y = (x - 12) ^3 - 7

Stan is on a bike ride. His GPS indicates that he has traveled exactly 18 miles and he is 32% complete with his total ride. How many miles long is Stan's ride?

What is the inverse of f (x) = The quantity of three x plus five, over seven.?

The diameter of a sphere is 2 ft. What is the sphere's volume? Round to the nearest tenth.

9/10 miles in 5 minutes At this rate how many miles can he in in one minute

A fitness club requires a one - time free of $100 and dies of $20 every month. write an expression for the total cost of membership for n months