Question

A small child is at a candy store, eager to spend his $1 allowance on candy. His two favorite candies are priced at $0.05 and $0.10, respectively. If the child is intent on spending his entire allowance on candy, which of the following represents a standard form equation that describes this situation?
A. 0.05x+0.10y=1.00

B. 0.10x-0.05y=1.00

C. 5x+10y=100.00

D. x+2y=20.00

Answer 1

Options A, C, and D are all correct.

0.05x + 0.10y = 1.00 ------------------------- (option A)
 
Multiply by 100 through:
5x + 10y = 100.00    ------------------------- (option C)

DIvide by 5 through:
x + 2y = 20.00         ------------------------- (option D)


The question asked for the standard form, so the answer is Option D.

Answer: Option D

Answer 2

While both a and c work the most likely answer that they want would be A because it represent the cents already and it shows all possible ways that those two values can be split among 1 dollar