The answer is A. 60x^3 + 70x^2 + 90x. This is because 10x × 6x^2 = 60x^3, 10x × 7x = 70x^2, and 10x × 9 = 90x. I hope this helps!
Answer:
-4/5x-3
Step-by-step explanation:
We can eliminate the options C and D as they have a +3 which means they would start at (0,3).
y=-4/5x-3
y=-4/5(-5)-3
y=4-3
y=1
same thing from last question
1=-4/5x-3
+3 to both sides
4=-4/5x
*5/4 to get 1x
5=-x
*-1 to get positive x
-5=x
which proves my answer as correct
What I don’t understand could you provide more info so I can help
Answer:
(B) π/12 + π/6 k
Step-by-step explanation:
Points of inflection are where f"(x) = 0 and changes signs.
f(x) = cos²(3x)
f(x) = (cos(3x))²
f'(x) = 2 (cos(3x))¹ × -sin(3x) × 3
f'(x) = -6 sin(3x) cos(3x)
Using double angle formula:
f'(x) = -3 sin(6x)
f"(x) = -3 cos(6x) × 6
f"(x) = -18 cos(6x)
0 = -18 cos(6x)
0 = cos(6x)
6x = π/2 + 2πk or 6x = 3π/2 + 2πk
We can simplify this to:
6x = π/2 + πk
x = π/12 + π/6 k
Answer:
40°
Step-by-step explanation:
z+90+y+x=180°
z+90+30+40=180°
z=40°