Is four eighths bigger or smaller than tree fourths

What is the product? a-3/15a × 5/a-3

Which radical expression is a rational number? a. √ 360 b. √ 644 c. √ 225 d. √ 122

Which is a logical conclusion based on the given information? a. figure abcd is a rhombus by the definition of a rhombus. b. segment ac is congruent to segment dc by cpctc. c. angle acb is congruent to angle adc by the angle-side-angle theorem. d. triangle acd is congruent to triangle cab by the hypotenuse-leg theorem.