Questions in mathematics

Questions in mathematics

[Done] Can you help me with the first two questions?

[Done] Simplify the expression: \[\frac{2r - 4}{r - 2}\] Please help.

[Done] What percent represents the discount received when buying the sweater with an original price of $40 and a sale price of $25?

[Done] A regulation tennis court measures 78 feet long by 36 feet wide. Brad is making a scale drawing of the tennis court using a scale of 1 foot = 1/2 inch. How long in inches should the length of the tennis court be in Brad's drawing?

[Done] Solve for x: \[ x - \frac{1}{4} = \frac{1}{2} \]

[Done] The length of a tennis court is 78 feet. This is 3 less than 3 times the width of the court. What is the width of the court?

[Done] Solve using logarithms: [tex]5^{(3x-6)} = 125[/tex]

[Done] How to factor completely: \(15x^2 - 40x - 15\)

[Done] Contemporary American building bricks are rectangular blocks with the standard dimensions of about 5.7 cm by 9.5 cm by 20.3 cm. What is the volume to the nearest tenth of a unit?

[Done] Find the equation of the line that passes through the points (-800, 200) and (-400, 300).