Questions in mathematics

Questions in mathematics

[Done] The line with equation \( ax + by = 20 \) passes through the points \((-2, 10)\) and \( (1, 5) \). Find \( a \) and \( b \).

[Done] A video game is on sale for 25 percent off. The original price is $42. What is the discount? What is the sale price?

[Done] Decrease £120 by 45%.

[Done] Expand and simplify the following expression: \((2x^2 - 3x + 4)(x^2 + 5x - 7)\)

[Done] Is 26 a perfect square?

[Done] A box of cereal has a volume of 384 cubic inches. If the width of the box is 4 inches and the length is 8 inches, what is the height of the box?

[Done] Solve: \[ K = 2(11 - k) + 14 \]

[Done] You begin solving the equation \(4 - 5x = 59\) by subtracting 4 from both sides. Which is the best choice for Step 2?

[Done] How do you divide? Please help; I can't remember.

[Done] How do you figure out [tex]\frac{120}{f} = 1.2[/tex]?