Trig
sin(-315)=sin(-315+360)=sin(45)=sqrt(2)/2
maths
volume=3.14159*(150cm)^2*(72-70)cm
calculus
If f(x)=x^3+5x then f(3)=27+15=42, f(6)=216+36=252 and slope=(252-42)/(6-3)
math
nonlinear, f(3)=2*3^2-3*3+4=18-9+4 f(-3)=2*(-3)^2-3*(-3)+4=18+9+4
math (please help me)
y=-x^4+6
Applied Calculus
C(x)=ax+b a*10000+b=5380 a*15000+b=7690
math
Let the distance to school S, my speed=S/30 the speed of my brother=S/40 and I catch up with him after t min. Then S/40*(t+8)=S/30*t 30t+240=40t
calculus
1/(x^2-90^2)
ALEGBRA II ( inaccuracy
... add the two last eq. 3S1+S2=28 ... 4S1=28
Trigonometry
8sin^2+2cos^2=8sin^2+2(1-sin^2)=> a=6 & b=2
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