Martha has some nickels and dimes worth $6.25. She has three times as many nickels as dimes. How many nickels does she have?

75 nickels.

Step-by-step explanation:

Here is the system of equations you can use:

0.05n+0.1d=6.25 (which can be converted to 5n+10d=625)

3d=n

5(3d)+10d=625

15d+10d=625

25d=625

d=25

3(25)=n

n=75

correct

step-by-step explanation:

a net is a diagram that shows a “flattened” view of a solid. in a net, each face and base is shown with all of its dimensions. a net can also serve as a pattern to build a three-dimensional solid.

a pyramid is a three-dimensional object with a base that is a polygon and triangular faces that meet at one vertex.

" the net of a triangular pyramid consists of four triangles. the base here we are given of the pyramid is a equilateral   triangle, and the lateral faces are also triangles "