Answer:
D) y=2/9x2+2x+4
Step-by-step explanation:
y-intercept=4
2 x intercepts= 3 and 6
so y-intercept is point where x is 0 like (0,y)
x-intercept is the opposite y is 0 (x,0)
that means y-intercept is (0,4)
x-intercept is (3,0) and (6,0)
the formula of slope intercept form is
y=mx+b
b= is y-intercept
that means
y=ox^2+mx+4
x-intercept is point where y is 0
so solve
now lets try the first option
This is are quadratic functions
you need to plug in both of these until u get one that is right
change the y until you get both x's
the first option if wrong
second one y = 6x2 + 3x +4 has no x-intercepts
3rd option y=3/4x^2-6x-4
last option is y=
2/
9
x2+2 has points at -6. and -2.9999 or -3
A is ur answer hope u get a good grade with the rest
Answer:
Given Two equations :-
- multiplying eq.(i) by 2 eq.(ii) by 3.
- <u>placing this value of y² in eq. (i)</u>
3x²- 2×9 = 57
3x² - 18 = 57
3x² = 57 + 18
3x²= 75
x² = 25
<u>x = ± 5</u>
<h3>So, the values of x are <u>+5 and -5</u> </h3><h3>and the values of y are
<u>+3 and -3</u></h3>
<span>E[Y] = 0.4·1 + 0.3·2 + 0.2·3 + 0.1·4 = 2
E[1/Y] =0.4·1/1 + 0.3·1/2 + 0.2·1/3 + 0.1·1/4 = 0.4 + 0.15 + 0.0666 + 0.025?0.64
V[Y] =E[Y2]-E[Y]2= (0.4)·12+(0.3)·22+(0.2)·32+(0.1)·42-22= 0.4+1.2+1.8+1.6-4= 5-4 = 1</span>
