Answer:
x = ±sqrt(5/2)
Step-by-step explanation:
6x^2−2=13
Add 2 to each side
6x^2−2+2=13+2
6x^2 = 15
Divide each side by 6
6/6x^2 = 15/6
x^2 = 5/2
Take the square root of each side
sqrt(x^2) = ±sqrt(5/2)
x = ±sqrt(5/2)
Answer:
Step-by-step explanation:
by factorising ;
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Answer:
18
Step-by-step explanation:
60% 0f 30 is 18
D. 18
180deg = pi radians
130deg = (pi/180)*(130) = 13pi/18
We need two periods so we need to cos go from 0 to 2π
x - pi/3 = 0
x = pi/3
x - pi/3 = 2pi
x = 2pi + pi/3
x = 7pi/3
xmin = pi/3
xmax = 7pi/3