Determine whether the following statement is always, sometimes, or never true. Explain your reasoning. If the system y=ax+b and y=cx+d has exactly one solution, then b=d.

Asquare and an equilateral triangle have the same perimeter. each side the triangle is 4 inches longer than each side of the square. what is the perimeter of the square

1. 2. ∠b and ∠y are right angles. 3.? 4.? which two statements are missing in steps 3 and 4? ∠x ≅ ∠c △abc ~ △zyx by the sas similarity theorem. ∠b ≅ ∠y △abc ~ △zyx by the sas similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem. = 2 △abc ~ △zyx by the sss similarity theorem.

Which equation can be used to measure the density of water in a spherical water tank? let w represent the number of water particles within the region.