Answer:
i think the answers are A, C and D
Step-by-step explanation:
What is 3/5 of 7 kg ?
of = multiplication
3/5 × 7 = ?
0.6 × 7 =
4.2
3/5 of 7 kg is 4.2 kg.
F(x)=12,000(1.08)^x
The answer is the first equation.
The equation increases so 1 is added to 0.08 (8%).
Answer:
b^2-4b+3=0
b²-3x-b+3=0
b(b-3)-1(b-3)=0
(b-3)(b-1)=0
either
b=3 or b=1
.
2n^2 + 7 = -4n + 5
2n²+4n+7-5=0
2n²+4n+2=0
2(n²+2n+1)=0
(n+1)²=0/2
:.n=-1
.
x - 3x^2 = 5+ 2x - x^2
0=5+ 2x - x^2-x +3x^2
0=5+x+2x²
2x²+x+5=0
comparing above equation with ax²+bx +c we get
a=2
b=1
c=5
x={-b±√(b²-4ac)}/2a ={-1±√(1²-4×2×5)}/2×1
={-1±√-39}/2
