Natalie budgets $146 for yoga training. she buys a yoga mat for $10 and pays $9 per yoga class. which inequality represents the number of classes, c, that natalie can take and stay within her budget? .

a: 146≤ 9c+10
b: 146≥ 9c+10
c: 146≤ 10+9
d: 146≥ 10c+9

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