In the diagram shown, altitude AC is drawn from a right angle to BD in such a way that BC:DC = 4:1. Find the length of DC algebraically. Show your work below.​

Ageologist had two rocks on a scale that weighed 4.6 kilograms together. rock a was 0.5 of the total weight. how much did rock a weigh?

Acertain volume of water contains 100000 hydrogen atoms and 50,000 oxygen atoms how many hydrogen atoms are in a volume of water containing 4 million oxygen atoms

Plz ( true - false) all triangles have interior angles whose measure sum to 90.