Answer:
Step-by-step explanation:
Cos θ =<u> u*v </u>
IuI *IvI
u * v = 7*(-1) + (-2)*2
= -7 - 4
= -11
IuI = 
= 
= 
I vI = 
= 
= 
Cos θ = 
= 
Cos θ = -0.68
θ = 132.5°
Answer:
2) First option
3) Second option
Step-by-step explanation:
5² = 625
13 × 8 × 5 = 520
Answer:
C
Step-by-step explanation:
The 4 is the base price. Paying 5g or $5 per game is the add on
Barry = 92
heidi = h
92 = h + 18
92 - 18 = h + 18 - 18
74 = h
heidi has 74 marbles
Answer:
Step-by-step explanation:
its b