Solve the system by the method of substitution.
?
?
?
A. 
B. (1, 3)
C. 
D. 
E. (-1, 3)
Answer: D
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Find the indicated term.Find a8 when a1 = -7 and d = -3.
A. -28 B. 17 C. 14 D. -31
Solve the problem.The gravitational attraction A between two masses varies inversely with the square of the distance between them. If the force of attraction is 9 lb when the masses are 2 ft apart, what is the attraction when the masses are 6 ft apart?
A. 3 lb B. 2 lb C. 4 lb D. 1 lb
Factor completely, or state that the polynomial is prime.100x2 - 140x + 49 - 9y2
A. (10x - 7 + 3y)(10x - 7 - 3y) B. (10x + 7 + 3y)(10x - 7 - 3y) C. (10x + 7 + 3y)(10x + 7 - 3y) D. prime
Solve the problem.Acme Electronics is a company which makes computer chips. The following table gives the revenue, y, in dollars for this company during the three stated years, x. In this table x = 0 corresponds to 1980, while src="https://sciemce.com/media/4/ppg__fdgfd0509192127__f1q152g3.jpg" alt="" style="vertical-align: -4.0px;" /> Round your answer to the nearest hundred dollars..
A. $3,901,100
B. $3,900,000
C. $3,899,600
D. $3,900,600
corresponds to 1986.
This set of data can be modeled by f(x) = ax2 + bx + c, where x represents the year. Find a linear system for which the solution represents the values of a, b, and c. Use technology to solve this system. Then, using the quadratic equation, predict the revenue for the year