Which graph correctly solves the system of equations below? y = x2 + 2x + 3 y = −x2 + 3 two quadratic graphs opening up. they intersect at 0, 3. two quadratic graphs opening down. they intersect at 0, 3. quadratic graph opening up and quadratic graph opening down. they intersect at 1, 4 and 0, 3. quadratic graph opening up and quadratic graph opening down. they intersect at negative 1, 2 and 0, 3.

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

Rose bought a new hat when she was on vacation. the following formula describes the percent sales tax rose paid b=t-c/c

He graph of f(x) = |x| is stretched by a factor of 0.3 and translated down 4 units. which statement about the domain and range of each function is correct? the range of the transformed function and the parent function are both all real numbers greater than or equal to 4. the domain of the transformed function is all real numbers and is, therefore, different from that of the parent function. the range of the transformed function is all real numbers greater than or equal to 0 and is, therefore, different from that of the parent function. the domain of the transformed function and the parent function are both all real numbers.