Solve the system of equations by the substitution method.
A. (- 
, - 
)
B. (- 
, - 
)
C. infinite number of solutions
D. no solution
Answer: B
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Solve. Assume the exercise describes a linear relationship.A vendor has learned that, by pricing hot dogs at $1.75, sales will reach 76 hot dogs per day. Raising the price to $2.50 will cause the sales to fall to 43 hot dogs per day. Let y be the number of hot dogs the vendor sells at x dollars each. Write a linear equation that models the number of hot dogs sold per day when the price is x dollars each.
A. y = - 
x + 
B. y = -44x - 153
C. y = 44x - 1
D. y = -44x + 153
Round the money amount to the specified place.$2.357 to the nearest cent.
A. $2 B. $2.35 C. $2.4 D. $2.36
According to the Pythagorean Theorem, the length of the hypotenuse of a right triangle is 
where c is the length of the hypotenuse and a and b are the lengths of the legs. the equation 
can also be used to find the diagonal of a square or a rectangle. Find the missing length, x, and simplify the result.
A. x = 13 B. x = 18 C. x = 25 D. x = 24
Use a proportion to solve the problem.Coffee beans from 14 trees are required to produce the 17 lb of coffee that the average person in the United States drinks each year. About how many trees are required to produce 380 lb of coffee? Round to the nearest whole number.
A. 461 trees B. 313 trees C. 294 trees D. 335 trees