Stephanie has the same number of dimes and nickels. She has $6.10 in all. Write an equation that you could use to find the number of dimes and nickels Stephanie has.

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

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.

Which of the following represents the length of a diagonal of this trapezoid?