Exercise 2 1.2
1
1.4.
calculate the value of each expression for the given number values:
+ 3y – y + 5 if y = -1
(3x?y-3)2 if x = 2 and y = -1
If a = -2, b = 1 and c = 0, calculate the value of:
(a + b) + (a + b + c)(a - b)
2.1 25-3a2b2 + (3,5)
1.1 x2 - 3x + 4 if x = -2
1.3 (37) if a = 2 and b = -1
2.2.
2
Unit 3: Calculations with exponents​

Captain umaima has a ship, the h.m.s. khan. the ship is two furlongs from the dread pirate nadia and her merciless band of thieves. the captain has probability 3/7 of hitting the pirate ship. the pirate only has one good eye, so she hits the captain's ship with probability 2/5. if both fire their cannons at the same time, what is the probability that the captain hits the pirate ship, but the pirate misses.