what is the value of g(-4) when g(x)=3x-5
Given g(x) = 3x -5
To find g(-4) we replace x with -4 in g(x) = 3x -5
g(x) = 3x -5
g(-4) = 3(-4) -5= -12 -5 = -17
the value of g(-4) = -17
The steps are:
1 : g(x) = 3x -5
2 : Replace -4 for x
3: g(-4) = 3(-4) -5
4 : g(-4) = -12 -5
5: g(-4) = -17
the value of g(-4) = -17
We have solutions of 20% acid and 40% acid.
We need 60 liters of 40% acid.
"t" is liters of 20% and "f" is liters of 40%
We have to set up two equations:
A) t + f = 60
B) .20t + 1.0f = (60*.40)
Multiplying equation A) by -.2
A) -.2t -.2f = -12 then adding that to B)
B) .2t + f = (24)
.8f = 12
forty per cent volume = 15 liters
A) t + f = 60
Twenty per cent volume = 45 liters
Source:
http://www.1728.org/mixture.htm
6:18 students in Debra's class own a cellphone. Because there are 24 people in total. Minus the people who already own cellphones. Leaving 18 without cellphones. The ratio is people who have cellphones to people who do not.
24-6=18. Thus, the ratio would be 6:18
The smaller the value of the least increment, the more precise a number is.
Length measured to the nearest 1/8 inch will be more precisely specified than length measured to the nearest 1/4 inch.
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In general, <em>precision</em> has little to do with <em>accuracy</em>—how close the measured value is to the actual value. A measurement can be very precise, but just plain wrong. (Many electronic instruments have resolution (precision) that exceeds their accuracy. That is, one or two (or more) of the least-significant displayed digits may be in error.)