Engines make up 25% of Denise's collection of 12 miniature train engines and boxcars. After Denise added new engines, her collection was 50% engines. How many engines did she add?

A slope of - 5/3 passes through (-6, 8)

The sum of a block of land's length and width is 30m. If x = the width the expression for the land's length is 30 - x. Given the length and width must be positive values, solve an appropriate inequality to find the possible values of x.

Allie knows that to get her test grade she would take Valerie's grade, multiply it by two and subtract 15. If Valerie's test grade was x, how would you write allies test grade? A) 2x B) 2x+15 C) 2x-15 D) 15x-2

A survey 3 out of 65 happy meals contain a special prize how many special prizes should a person expect to win 130 happy meals first purchase

How do we add linear expressions?

The function f (x) = - x2 - 2x + 15 is shown on the graph. What are the domain and range of the function?

Let the test statistic Z have a standard normal distribution when H0 is true. Give the P-value for each of the following situations. (Round your answers to four decimal places.) (a) Ha: μ > μ0, z = 1.73 P-value = (b) Ha: μ < μ0, z = - 2.

Solve the proportion of 8/13=v/8

Together, Amy and Thea make up 1/4 of the midfielders on my the soccer team. How many midfielders are on the team? Show your work

What is the difference between dash and hyphen