N-1/5=7/20

I need to solve for N, having trouble with steps.

Which is the correct estimation and justification for the problem shown below? V10 = ? about 5, because 2 x 5 = 10 about 5, because 5 + 5 = 10 about 4, because 4 x 4 = 16 about 3, because 3x3 = 9

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Use synthetic division to find the quotient and remainder when 23? + 622 - 142 + 9 is divided by 2 + 3.

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There are 276 plan in the flower garden what is 276 rounded to the nearest ten?

13 out of 60 people surveyed what angle in a pie chart would you use?

A toy company produces rubber balls that have a radius of 1.7 cm. A sphere has a radius of 1.7 centimeters. What is the volume of one rubber ball? Round to the nearest hundredth of a centimeter.