Solve the system of equations by elimination. x - 5y = 35 5x - 4y = 28
A. (7, 0 )
B. (1, - 8)
C. (1 , - 7)
D. (0, - 7)
Answer: D
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Identify the terms. Then identify the coefficients of the variable terms of the expression.
A. 
and 
are the terms; 7 and 
are the coefficients.
B. 
and 
are the terms; 7 and 
are the coefficients.
C. 
and 
are the terms; 7 and 
are the coefficients.
D. 
and 
are the terms; -7 and 
are the coefficients.
E. 
and 
are the terms; 7 and 
are the coefficients.
Solve the problem.
The graph shows the amount of oil in a 150-gallon tank after x minutes have elapsed. (i) Find the slope-intercept form of the equation of the line. (ii) Use the graph to estimate the x-coordinate of the point 
that lies on the line..
A. y = 15x + 2; (2, 32) B. y = 15x; (2, 30) C. y = -15x; (2, -30) D. y = 15x - 2; (0, 30)
The demand equation for a certain brand of metal alloy audiocassette tape is 
, where x represents the number (in thousands) of ten-packs demanded each week when the unit price is $p. How fast is the quantity demanded increasing when the unit price/ten-pack is $10 and the selling price is dropping at the rate of $.13/ten-pack/week? Round the answer to the nearest integer.
?
Hint: To find the value of x when p = 10, solve the equation 
for x when p = 10.
?
Increasing at the rate of __________ ten packs/wk.
Fill in the blank(s) with the appropriate word(s).
Graph the compound inequality.3x + y ? 3 or x - 4y ? 1
A. 
B. 
C. 
D. 