Ella has 50 stacks of ten pennies in each stacks. describe how to find how many pennies ella has in all.

Is triangle jkl congruent to triangle rst? if so, what is the scale factor?

Aadc is formed by reflecting aabc across line segment ac, as shown in the figure. if the length of ac is 4 units, the area of aadc is square units.

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?