Simplify completely quantity x squared plus 4 x minus 45 all over x squared plus 10 x plus 9 and find the restrictions on the variable. a quantity x minus 5 over quantity x plus 1, x ≠ −1, x ≠ −9 b quantity x minus 5 over quantity x plus 1, x ≠ −1, x ≠ 5 c quantity x plus 5 over quantity x plus 1, x ≠ −1, x ≠ −9 d quantity x plus 5 over x plus 1, x ≠ −1, x ≠ 5, and i know that b is wrong

Solve these problems: 1.what is the perimeter of an equilateral triangle with sides measuring 6cm? 2. a regular pentagon has sides measuring 3.2 cm. what is its perimeter? 3. a regular decagon has sides of 3.5mm . what is it’s perimeter? 4. a regular octagon has a perimeter of 64cm. what is the length of one of the sides? 5. a regular hexagon has a perimeter of 72mm . what is the length of one of the sides? 6. what is the perimeter of a rhombus with sides measuring 11m?