What is the solution of the system? -2x-5y= -1
4x-y=13

A.(-1,3)
B.(3, -1)
C.(-3,1)
D.(1, -3)

Which number line represents the solution set for the inequality -1/2x> 24?

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3

Awater holding tank measures 105 m long, 50 m wide, and 8 m deep. traces of mercury have been found in the tank, with a concen- tration of 60 mg/l. what is the total mass of mercury in the tank? answer in units of kg.