Solve by factoring. x² - 121 = 0 0 -11 11 11, -11 solve by factoring. m² + 8m + 7 = 0 8,7 -7, 1 -7, -1 7, 1

Which shows the correct substitution of the values a, b and c from the equation 1=-2x+3x^2+1

Which of the following would be a reasonable estimate for the weight of a pencil? a. 1 × 10^-20 lb b. 1 × 10^20 lb c. 1 × 10^2 lb d. 1 × 10^-2 lb

Answer asap and if you do you will get brainliest. catherine buys a gallon of ice cream from the store. after taking it home, she eats a fifth of a gallon of ice cream. her sister eats some of the ice cream as well. if two-thirds of the original amount of ice cream is left, then what fraction of a gallon of ice cream did her sister eat?