Will a 9m long planks fit into a square room of side 7m? i really needed with this one

Measures of the angle of r, 31 s (x+4) t (3x+9)

The length of triangle base is 26. a line, which is parallel to the base divides the triangle into two equal area parts. find the length of the segment between triangle legs.

For each polynomial, determine the degree and write the polynomial in descending order. a. –4x^2 – 12 + 11x^4 b. 2x^5 + 14 – 3x^4 + 7x + 3x^3