For the following system, use the second equation to make a substitution for x in the first equation. x + 3y = 5

x + 7 = 2y

What is the resulting equation?

2 y + 7 + 3 y = 5
2 y - 7 + 3 y = 5
2 y + 2 x + 3 y = 5

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

Jonathan can type 20 documents in 40 minutes ,and susan can type it in 30 minutes and jack can type it in 24 minutes working together ,how much time will it is take them type the same document

What 8/12+8/11 in another way than and improper fraction