1) 4(x-6)<2
2) 7n+19<8
3) 3(11+x)>=15
4) 4n-12<6
5) 2n+14>=1
6) 2(x+7)>=10
7) 11n-3>9
8)8x+4<=13
9)5n+16>=9
10) 4(x+2)<14
Answer: She invested $34100 at 10% and $68200 at 6%.
Steps:
Let x1 be the amount invested at 6%, x2 the amount at 10%
After one year the simple interest is amount * (interest rate).
The total interest after one year:
7502 = x1 * 0.06 + x2 * 0.10
and we know that x1 = 2*x2
7502 = 2* x2 * 0.06 + x2 * 0.10 = 0.22 * x2
x2 = 34100
x1 = 2*34100=68200
0 is the set of
(A) all real numbers
(B) all integers
(C) all rational numbers
(D) all irrational numbers
(E) all odd integers
0.54, 0.6, 0.66, 0.72,