Pre-calculus
given vectors
a=(-1,2)
b=(-1,3)
find a+3b

a + 3b = (–4, 11)

Solution:

Given vectors are a = (–1, 2) and b = (–1, 3).

Adding two vectors:

Add first component of one with first component of other and

add second component of one with second component of other

To find a + 3b:

a + 3b = (–1, 2) + 3(–1, 3)

          = (–1, 2) + (–3, 9)

          = (–1 +(–3), 2 + 9)

          = (–1 –3, 2 + 9)

          = (–4, 11)

Hence a + 3b = (–4, 11).

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step-by-step explanation:

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answer: there are x+184 pages in olivia's book.

step-by-step explanation:

let the total number of pages in the book which olive has already read be x.

then if olive has 184 pages left to read, then the total number of pages are in olive's book= pages she has read+pages she has left to read

therefore, the total number of pages in olivia's book=

hence, there are x+184 pages in olivia's book.