The angle between two vectors is:
CosФ = u - v / Magnitude(u) x magnitude(v)
Magnitude of u = SQRT(7^2 + -2^2) = SQRT(49 +4) = SQRT(53)
Magnitude of v = SQRT(-1^2 +2^2) = SQRT(1 +4) = SQRT(5)
u x v = (7 x -1) + (-2 x 2) = -7 + -4 = -11
cosФ = -11 / sqrt(53) x sqrt(5)
cosФ = -11sqrt265) / 265
Ф =cos^-1(-11sqrt265) / 265)
Ф=132.51 degrees.
The second one I believe because it’s basiclalu going up one half everytime to get to one
Answer:
get stuff out of parentheses solve obvious problems, solve x
“Four times the difference of a number and 7 is 32”
Translation-
4(x-7)=32
Answer:
The Answer is 1080x^21 + 2160x^20 + 3
Step-by-step explanation: