Let a = (-3,4) and v = (4,-5).

If a + b = v. find b.

b = (7, - 9)

Step-by-step explanation:

Let a = (-3,4) and v = (4,-5).

If a + b = v. find b.

performing the addition of the vectors would mean that we add corresponding coordinates.

so

let b = (x, y)

then a + b = (-3, 4) + (x, y) = (-3 + x, 4+y) = v = (4, - 5)

-3 + x = 4

4 + y = - 5

x = 7

y = - 5 - 4 = - 9

so b = (7, - 9)