Concept 1: Linear Equations Containing Fractions For Exercises 9–14, determine which of the values could be used to clear fractions or decimals in the give equation. 1 1 . 0.02 x + 0.5 = 0.35 x + 1.2 values : 10 ; 100 ; 1000 ; 10 , 000
Concept 1: Linear Equations Containing Fractions For Exercises 9–14, determine which of the values could be used to clear fractions or decimals in the give equation. 1 1 . 0.02 x + 0.5 = 0.35 x + 1.2 values : 10 ; 100 ; 1000 ; 10 , 000
Solution Summary: The author explains how 100, 1000 and 10000 could be used to clear tions or decimals from the equation 0.02x+0.5. The LCD (Least Common Denominator) of
For Exercises 49–52, rewrite the equation so that the coefficient on x is positive.
The average amount A (in pounds per person) of fish and shellfish consumed in the UnitedStates during the period 1992–2001 can be modeled by
A = (3.2x + 260)/(52x + 3800)
where x is the number of years since 1992.Rewrite the model so that it has only whole number coefficients. Then simplify the model.
Solve the variation problems in Exercises 68–73.
68. A company's profit varies directly as the number of products
it sells. The company makes a profit of $1175 on the sale
of 25 products. What is the company's profit when it sells
105 products?
69. The distance that a body falls from rest varies directly as
the square of the time of the fall. If skydivers fall 144 feet in
3 seconds, how far will they fall in 10 seconds?
70. The pitch of a musical tone varies inversely as its wavelength.
A tone has a pitch of 660 vibrations per second and a
wavelength of 1.6 feet. What is the pitch of a tone that has a
wavelength of 2.4 feet?
71. The loudness of a stereo speaker, measured in decibels, varies
inversely as the square of your distance from the speaker.
When you are 8 feet from the speaker, the loudness is
28 decibels. What is the loudness when you are 4 feet from the
speaker?
72. The time required to assemble computers varies directly as the
number of computers assembled and inversely as…
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