Which system of equations has no solution?

4x + 4y = 22 and 6x + 6y = 33
3x + 6y = 11 and –8x – 16y = –18
4x – 10y = 8 and 10x – 25y = 20
–12x + 15y = –5 and 16x + 20y = 4

Determine whether the samples are independent or dependent. upper a data set includes the morning and evening temperature for the lasta data set includes the morning and evening temperature for the last 90 days.90 days.

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered

Find the solution(s) to x^2-14+49=0