exam Maths Puzzle Numerical Ability

Please help me solve for R in the following equation:
8L=sqrt 5F/R

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exam Other Question

Hello, I could reeally use some help with this one. Thanks! The price of one brand of athletic shoes is $5 more than another brand. If the prices of the two pairs of shoes add to $230, how much does each pair cost? Kackie Smith won $60,000.00 in a slot machine in Las Vegas. She invested part at 2% simple interest and the rest at 3%. She earned a total of $1600.00 in interest. How much was invested at each rate?