1/5 < 3/10 < 1/2 i believe thats it i hope this helped:)
Answer:
Step-by-step explanation:
it is maximum.
when leading coefficient of x² is negative,
It is downward parabola.
or
y=-2x²+10x+1
=-2(x²-5x+(-5/2)²-(-5/2)²)+1
=-2(x-5/2)²+2×25/4+1
=-2(x-5/2)²+25/2+1
=-2(x-5/2)²+27/2
maximum value of y is 27/2 and is attained at x=5/2
vertex is (5/2,27/2)
N=90 you have to simplify both sides then isolate the variable :)
Answer:
168
Step-by-step explanation:
If he was faster than Don then it should've taken him less time. So Don would've taken 30 seconds MORE
138+30=168
