If a bag contains 12 quarters 6 dimes and 18 nickles what is the part to whole ratio to all coins

If the measure of angle 1 is 110 degrees and the measure of angle 3 is (2 x+10 degree), what is the value of x?

What is the simplified form of (3.25x10^3)(7.8x10^6) written in scientific notation?

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.