If f(x) = 3x + 5 and g(x) = -2x2 - 5x+ 3, find (f+ g)(x). O A. (f+ g)(x) = -4x + 8
O B. (f+ g)(x) = -2x2 – 2x+ 8
O C. (f+ g)(x) = -2x2 + 8x + 8
OD. (f+ g)(x) = -2x + 8

You’re giving a cube with a length of 2.5 cm and a width of 2.5 cm and a high of 2.5 cm you place it on a scale and it is 295 g calculate the density

Aspacecraft can attain a stable orbit 300 kilometers above earth if it reaches a velocity of 7.7 kilometers per second. the formula for a rocket's maximum velocity v in kilometers per second is vequalsminus0.0098tplusc ln upper r, where t is the firing time in seconds, c is the velocity of the exhaust in kilometers per second, and r is the ratio of the mass of the rocket filled with fuel to the mass of the rocket without fuel. find the velocity of a spacecraft whose booster rocket has a mass ratio of 20, an exhaust velocity of 2.1 km/s, and a firing time of 15 s. can the spacecraft achieve a stable orbit 300 km above earth?

Lines a and b are perpendicular. if the slope of line a is 3, what is the slope of line b?