Questions in mathematics

Questions in mathematics

[Done] Evaluate the following expression using the given values: Find \(-3a^2 - b^3 + 3c^2 - 2b^3\) if \(a = 2\), \(b = -1\), and \(c = 3\).

[Done] Round 3.79 to the nearest tenth.

[Done] If \( y \) varies jointly as \( x \) and \( z \) and \( y = 60 \) when \( x = 3 \) and \( z = 4 \), find \( y \) when \( x \) is 6 and \( z \) is 8.

[Done] Write an expression to solve for the radius of an object with a circumference of 30 feet.

[Done] An arc of a circle measures 80 degrees and has a length of [tex]88\pi \text{ cm}[/tex]. What is the diameter?

[Done] Traditions Clothing Store is having a sale. Shirts that were regularly priced at $20 are on sale for $17. What is the percentage of decrease in the price of the shirts?

[Done] What is 5 times the square root of 54?

[Done] For what value of [tex]x[/tex] would the quotient [tex](3x^2 + 4x - 5) \div (x + 2)[/tex] not make sense?

[Done] What is 8.94 rounded to the nearest tenth?

[Done] Which line shows the first error in the solution? 1. \(5(x-5) = 15\) 2. \(5x - 25 = 15\) 3. \(5x - 25 = 15 - 25\) 4. \(5x = -10\) 5. \(\frac{5x}{5} = \frac{-10}{5}\) 6. \(x = -2\) Answers: A. line 2 B. line 3 C. line 4 D. line 5