Solve using the substitution method. Use a graphing calculator to check your answer. x + 7y = 163x + 21y = 48
A. (0, 0)
B. (3, 3)
C. No solution
D. Infinitely many solutions
Answer: D
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Insert the correct sign of inequality (> or <) between the given numbers.
3.17
A. 
< 3.17
B. 
> 3.17
Solve the problem.At a state fair truck pull, two pickup trucks are attached to the back end of a monster truck as illustrated in the figure. One of the pickups pulls with a force of 1800 pounds and the other pulls with a force of 3800 pounds with an angle of 45° between them. With how much force must the monster truck pull in order to remain unmoved? HINT: Find the resultant force of the two trucks. Round your answer to the nearest tenth. 
A. The truck must pull with a force of 2183.3 lb. B. The truck must pull with a force of 5230.0 lb. C. The truck must pull with a force of 4910.5 lb. D. The truck must pull with a force of 2829.6 lb.
Solve the problem.Evaluate arccos 
radians.
A. 
B. 
C. 
D. 
Provide an appropriate response.What is the additive inverse of 0?
Fill in the blank(s) with the appropriate word(s).