CPM Homework Help : APCALC Problem 11-10

Let $\mathbf{a}= ⟨–2, 5⟩$ , $\mathbf{b} = ⟨6, 0⟩$ , and $\mathbf{c} =\langle \frac { 3 } { 2 } , 8 \rangle$ . What are:

$2\mathbf{c} - \mathbf{a}$
Step 1(a):
$2\big<\frac{3}{2},8\big>-\big<-2,5\big>$
Step 2(a):
$\big<3,16\big>-\big<-2,5\big>$

$| | \mathbf{a} + \mathbf{b} | |$
Hint (c):
Express $\vec{a}+\vec{b}$ as a single vector.
More Help (c):
The double bars indicate "the length of". Use the Pythagorean Theorem to calculate this length.