Answer: 2
(
x
+
4
)
Step-by-step explanation:
Answer: has a maximum
the maximum is 11
Step-by-step explanation:
f(x)= -5x^2-10x+6
the function f(x)= ax^2+bx+c=0 has a<0 so the equation has a maximum
I know V has the coordonate x=-b/2a, and y=-(b^2-4ac)/4a
b^2-4*a*c= (-10)^2-4*(-5)*6=100+120=220
so -b/2a=-(-10)/-2*5=+10/-10=-1 and
-(b^2-4ac)/4a=-220/4*(-5)=-220/-20=22/2=11
so V( -1, 11)
and the maximum is 11
4: No (2 x 4=8+7=16)
5: Yes (-6 x 5= -30 +10=-20)
6: Yes (27 / 3=9 - 7=2)
7: Yes (5 x 4=20 + -8=12)
8: No ( -16/-4= -4 + 3=-1)
9: Yes (3/4 x 20/1=60/4=15)
Kristin is 13 !! , i took 13 for Kristins age, and took 13-2 for Susans age which leaves 11, 13+11 = 24. i multiplied 13 twice and got 26 and subtracted 3 for Kates age, and got 23. 24+23 = 47.
First, divide 30 by 2, then times that by 20. Or, you could times 30 by 10<span />
