Adam bought 2 mechanical pencils and 8 spiral notebooks for school and it cost him $13. Kia spent $12.50 on 3 mechanical pencils and 5 spiral notebooks. Let p = the cost of a mechanical pencil.

Let n = the cost of a spiral notebook.

Write a system of equations that can be used to determine the cost of a mechanical pencil and the cost of a spiral notebook. Drag the numbers to create the system of linear equations.

Asystem of equation is shown below 6x - 2y equals 3 . and 5x + 3y equals 4. would you solve by substitution or elimination? and why

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.

Factor the trinomial below. 12x^2 - 32x - 12 a. 4(3x+3)(x-1) b. 4(3x+1)(x-3) c. 4(3x+6)(x-2) d. 4(3x+2)(x-6)