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

What is 1/3 Times 12

Mandy's bird feeder holds 2/3 of a cup of birdseed. mandy is filling the bird feeder with a scoop that holds 1/6 of a cup. how many scoops of birdseed will mandy put into the feeder

A plumber charges a service call fee of $25 plus $40 for each hour she works. which variable is the independent variable? A. the total cost of the plumber's services for a service call B. the number of hours the plumber works on a service call C.

A fair 6 sided die is rolled five times. What is the probability that the sequence of rolls is 4,6,1, 5, 3?

Write each percent as a decimal 89% 100% 0.01%

Find the sum of 5m + 3n + p, - 5p + 3n, and 2n - m.

Marcia buys a dress that is on sale for 15% off it's original price. She uses a store coupon to obtain an additional 10% off the sale price. Marcia pays $91.80 for the dress. What was the original price of the dress?

Im 10 years old-2+7 times 2 divided by 5+100-15-70 How old am I?

What is the value of x? (2x-2) (3x-52)

A rental car cost a one time fee of $30 and then an additional $15 for each day it is rented. If the Webb family's total bill was $135, how many days did they rent the car?