PLZ HELP!! The function c(x) = 2.5x + 15 shows the cost, in dollars, to make x necklaces.

What is c(10)?

What is c(15)?

What is the best interpretation of c(20) = 65 in terms of the problem?

Look at this system of equations. -3x + 3y = 12 y = x + 4 the solution set of this system is best explained by which of these statements? a) the graphs of the equations are the same line because the equations have the same slope and the same y-intercept. the system has infinitely many solutions. b) the graphs of the equations are parallel lines because they have the same slope but different y-intercepts. the system has no solution. c) the graphs of the equations are lines that intersect at one point because the equations have the same slope but different y-intercepts. the system has exactly one solution. d) the graphs of the equations are lines that intersect at one point because the equations have the same slope and the same y-intercept. the system has exactly one solution.

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

Two similar solids have heights of 6 cm and 9 cm. if the volume of the smaller solid is 88 cm^3, calculate the volume of the larger solid. give an explanation with your answer!