Solve the system by substitution. 2x – y + z = -4 Z = - 2x + 3y - 2 = -10 A. (-8, 7,5)
B. (-8, -7,5)
C. (8,- 7,5)
D. (-8, -7, -5)

The vertex of this parabola is at (-2,-3). when the x-value is -1, the y-value is -5. what is the coefficient of the squared expression in the parabola's equation?

Suppose babies born after a gestation period of 32 to 35 weeks have a mean weight of 25002500 grams and a standard deviation of 800800 grams while babies born after a gestation period of 40 weeks have a mean weight of 27002700 grams and a standard deviation of 385385 grams. if a 3232-week gestation period baby weighs 21252125 grams and a 4040-week gestation period baby weighs 23252325 grams, find the corresponding z-scores. which baby weighs lessless relative to the gestation period?

Find the circumference of a pizza with a diameter of 10 inches round to the nearest tenth