4 9 Which equation could you use to solve for x in the proportion
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4x= 14
4x=45
5x=13
5x = 36

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Which expression converts 45 degree to radians

I'm at a bookstore with $\$35$ in my pocket and a $20\%$-off coupon. what is the cost of the most expensive book i can buy with my money and the coupon? (assume that there are books of every possible price in the bookstore. it's a large bookstore! )