Solve the system by the substitution method. If there is no solution or an infinite number of solutions, so state. Use set notation to express the solution set.
A. infinitely many solutions; {
y = 3x + 3} or {
y = 5x + 2}
B. 
C. 
D. no solution; ?
Answer: B
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In 
, AB = 12, AD = 18, and m
= 56°. To the nearest square unit, find the area of 
.
What will be an ideal response?
Solve the problem.When a person bends at the waist with a straight back, the force, F, exerted by the person's lower back muscles can be estimated with the formula 
where w is the person's weight, and ? is the angle made by the person's torso relative to the horizontal. Use the sum identity for sine to simplify F.
A. F = 2.89w sin ? B. F = 2.89w (sin ? + cos ?) C. F = -2.89w cos ? D. F = 2.89w cos ?
Solve the problem.If w = 8i + 4j, find 2w.
A. 16i + 4j B. 10i + 4j C. 16i + 8j D. 10i + 6j
Find an equation of variation for the given situation.m varies directly as p, and m = 54 when p = 6.
A. m = 48p
B. m = 9p
C. m = 
p
D. m = 60p