(7x4 + 11x3 – x2 – 8x + 6) – (-12x4 + 9x2 – 15) a) -5x4 + 11x3 + 8x2 – 8x – 9 b) 19x4 + 11x3 – 10x2 – 8x + 21 c) 5x4 + 2x3 + 14x2 – 8x + 6 d) -19x4 – 2x3 – 8x2 – x + 9 e) -19x4 – 2x3 – 8x2 – x – 9

Convert the mixed numbers into improper fractions. convert the improper fraction to mixed numbers.

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm

Consider the triangle. which shows the order of the angles from smallest to largest? angle a, angle b, angle c angle b, angle a, angle c angle b, angle c, angle a angle c, angle a, angle b