What is the sum of the given polynomials in standard form?

(x2 – 3x) + (–2x2 + 5x – 3)

a –3x2 + 8x – 3
b –x2 – 2x – 3
c 3x2 – 8x + 3
d –x2 + 2x – 3

If 20% of a number is 35, what is 50% of that number?

The length of an intercepted arc of a central angle of a circle is 4 cm. if the radius of the circle is 5 cm what is the measurement of the central angle to the nearest whole degree

How many square inches are in 60 square feet?