Which pair of complex numbers has a real-number product?

(1 + 2i) (8i)

(1 + 2i) (2 - 5i)

(1 + 2i) (1 - 2i)

(1 + 2i) (4i)

Find the volume of the given solid. under the plane 7x + 2y - z = 0 and above the region enclosed by the parabolas y = x2 and x = y2

Which inequality is represented by this graph? A number line going from negative 5 to positive 5. An open circle is at 0. Everything to the right of the circle is shaded.

Hannah divides the wall into 11 equal sections Hannah paints 1 section herself what fraction of the wall does Hannah paint

A family went out to dinner. their bill was $65.00. they left a 15% tip on top of the bill. which amount is closest to the total cost of the dinner, including tip.

Dylan counts vehicles as they passed by his school. So far, he has counted three minivans, five trucks, two motorcycles and 10 cars. What is the estimated probability that the next vehicle that passes his school will be a motorcycle?

A battery manufacturer found that 3% of its batteries had defects. If 8000 batteries are sold, how many could be expected to have defects?

Kristine bought a vase that cost $5.99 and roses that cost $1.25 each. the total cost was $20.99. write and solve the equation to find how many roses Kristine bought.

How do you solve 7a - 17=4a+1

A warehouse floor measures 30 feet by the 48 feet. The owner who she's to cover it with new flooring. If the flooring costs $1.86 pero square foot, then what will be the cost of the new flooring

How did you actually solve for y and x