Please help I’m failing

What is the negation of the following statement?
m∠A is greater than 90.

A: m∠A is not less than 90.

B: m∠A is less than or equal to 90.

Do u just plot the numbers on the graph like (1,

The polygon tool to draw a rectangle with a length of 5 units and a height of 3 units. one of the sides of the rectangle falls on line ab , and the rectangle has a vertex of a. each segment on the grid represents 1 unit.

The angle of a triangle are given as 6x,(x-3), and (3x+7). find x then find the measures of the angles