The sum of the coordinates of the vertex of the parabola at LaTeX: y=x^2+3y = x 2 + 3 is .

Can someone me with this problem i don't understand i need

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

Idon't get undoing if its pass adding and subtracting so can someone ? x-2 over 5 = 18