whats does it me study the exercises in which both addends are negative. what do you notice about the sum

What number should be added to both sides of the equation to complete this square? x^2-10x=7

State if the two triangles are congruent. if they are, state how you know?

80 points suppose marcy made 45 posts online. if 23 of them contained an image, what percent of her posts had images? round your answer to the nearest whole percent. 54 percent 51 percent 49 percent 48 percent