2x+ky=7 and 4x-9y=4 find value of k if matrix of coefficients is singular

Units are squared when dealing with area but not when dealing with perimeter True or false

Which is greater 27 oz or 2 lb?

A volume of 4 ML and a mass of 24 grams. What is the density of the liquid?

The worlds narrowest electric vehicle is about 35 inches wide. how wide is the vehicle to the nearest foot

Helga works 20 hours per week she makes $12 a hour how do you translate into a algebraic equation

If X and Y are random variables, the sum of all the conditional probabilities of X given a specific value of Y will always be: -0.0-1.0-the average of the possible values of X.-the average of the possible values of Y.

The price of a car has been reduced from $12,500 to $7,750. What is the percentage decrease of the price of the car?

F (*) = -4 (*+2) 2 + 10 in the form f (*) = ax2 + bx+c

There is an escalator that is 1086.1 feet long and drops a vertical distance of 193.3 feet. What is the angle of depression?

The length of the one side of a square is 24 cm. Find the length of the diagonal. Show work.