7.2 Linear Programming 1. Petrus wants to plant x orange trees and y lemon trees.
He wants at least 3 oranges trees and at least 2 lemon trees.
(a) Write down one inequality in x and one inequality in y to
represent these conditions.
(b) There is space on his land for no more than 9 trees.
Write down an inequality in x and y to represent this
condition.

Which problem could be  solved  by evaluating the expression  7×(−3)7×-3?

Write the expression in complete factored form. 5n_(c - 3) - n(c - 3) =

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?