Answer:
Step-by-step explanation:
hello :
5x²+8x-4 quadratic expression when : a = 5 and b=8 and c= -4
∆ = b²-4ac ∆ = 8²-4(5)(-4) = 64 +80 = 144 = 12²
X1 = ( -b -√∆)/2a X1 = (-8-12)/10 = -20/10= -2
X2 =(-b+√∆)/2a X2 = (-8+12)/10 = 4/10 = 2/5
us factorisation : a(X-X1)(X-X2)
5x²+8x-4= 5(x+2)(x-2/5) = (x+2)(5x-2)
you can verify ; (x+2)(5x-2) = 5x²-2x+10x-4 = 5x²+8x-4
Answer:
1). 0.1667
2). 0.3333
3). 0.3333
Step-by-step explanation:
1). Probability that the student was female and got a 'B'
= 
= 
= 0.1667
2). Probability that the student was male and got an 'A'
= 
= 
= 
= 0.3333
3). Probability that the student got a B = 
=
=
= 0.3333
Answer:
1) yes--common difference is 3.
Answer: 15
Work Shown:
y - 2c
y - 2*(-5) ....... replace c with -5
5 - 2*(-5) ..... replace y with 5
5 + 10
15
Answer:
15.500000
Step-by-step explanation:
Change the divisor 0.3 to a whole number by moving the decimal point 1 places to the right. Then move the decimal point in the dividend the same, 1 places to the right.
We then have the equations:
46.5 ÷ 3 = 15.500000
and therefore:
4.65 ÷ 0.3 = 15.500000
Both calculated to 6 decimal places. There, I Solved It For You! :)
