Explain how you know which coins could be used to show 0.77 of a dollar

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Which composition of similarity transformations maps polygon abcd to polygon a'b'c'd'? a dilation with a scale factor less than 1 and then a reflection a dilation with a scale factor less than 1 and then a translation a dilation with a scale factor greater than 1 and then a reflection a dilation with a scale factor greater than 1 and then a translation