2. Use addition and subtraction to simplify the following polynomials. A. Add polynomials: (3 - 4x + 8x^2) + (-6 + 2x - 5x^2)
Step 1: Rewrite the polynomials without the parentheses. (1 point)
Step 2: Write the polynomial in descending order and use parentheses around like terms.
Step3: Add the like terms identified in Step 2 to simplify the polynomial.

Name the quadrilaterals that have four equal sides.

Find the value of x in each case. give reasons to justify your solutions! d q ∈ pr

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?