Given the matrices A and B shown below, solve for X in the equation -3X + A= 3B.

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

Antonia and carla have an equivalant percentage of green marbles in their bags of marbles. antonia has 4 green marbles and 16 total matbles. if carla has 10 green marbles , how many total marbles does carla have