Tan x + 1 = 0
tan x = -1
x = -π/4 + nπ ( n ∈ Z )
The answer is: " 6: 8 : 5 " .
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Given: "24: 32: 20" ; Divide by "4" :
24: 32: 20
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4
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to get: " 6: 8 : 5 " .
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7.$56,8.-$17,500,9.$810,10.-45,11.$-45,12.-$1,368,13.$27,14.$8,848,15.$390,$209
We begin with 100 mL of the 2% saline solution, and will add x mL of the 0.5% saline solution. The total volume of the mixture will be (100 + x) mL. The total mass of salt will be:
(100)(2%) + (x)(0.5%) = 2 + 0.005x
This would have to be 0.79% of the total volume:
(100+x)(0.79%) = 0.79 + 0.0079x
Equating:
x = 417.24 mL
4 times 8 tenths
1/10=1 tenth
8/10=8 tenths
4 times 8/10
4/1 times 8/10
(4 times 8)/(1 times 10)
32/10
16/5
5/5+5/5+5/5+1/5
1+1+1+1/5
3+1/5
3 and 1/5
