Simplify.

(3x2 + 2x + 7x3) + (10x2 + 6x + 9)

A) 7x3 + 13x2 + 8x + 9
B) 7x3 + 30x2 + 12x + 9
C) 13x2 + 8x + 16x3
D) 13x4 + 7x3 + 8x2 + 9

Acircle has a radius of 5/6 units and is centered at (3.6, 7.8) write the equation of this circle

Ialready asked this but i never got an answer. will give a high rating and perhaps brainliest. choose the linear inequality that describes the graph. the gray area represents the shaded region. y ≤ –4x – 2 y > –4x – 2 y ≥ –4x – 2 y < 4x – 2

Ascientist has 50 grams of a radioactive element. the amount of radioactive element remaining after t days can be determined using the equation (1) after two days the scientist receives a second shipment of 50 grams of the same element. the equation used to represent the amount of shipment 2 remaining after t days is 10) - 50 which of the following is an equivalent form of the expression for the amount remaining in shipment 2? what’s the answer?