How to find instantaneous rate of change?

Stefano paid $7 per hour to rent a bicycle. Jodrana paid $9 her hour to rent a bicyle if they both rent a bicycles for 3 hours how much more will jodrana pay

Complete the square of the following function: f (x) = 3x² - 12x + 6 What are the coodinates of the vertex of the graph? (2, 6) (-2, - 10) (2, 6) (-4, 6)

Log2 + log (4x-1) = 3

Alfred is practicing typing. The first time he tested himself, he could type 45 words per minute. After practicing for a week, he could type 48 words per minute. After two weeks he could type 51 words per minute.

What is the answer to my math question 8 (1+4b)

When this polynomial is simplified, what is the coefficient of x: 10x^2+8x-6x^3+4x^2+12x^3-x+20 ... ?

A club is making posters to raise money. the printer charges a base fee of $270 and $2 per poster for supplies. a person sells each poster for $5. how many posters must he sell to make profit of $300?

Write ratio in simplest form 6:3/5

The section has a height of 7.5 cm. If the area of the section of glass is 17.25 cm2, how long is the base of the section?

A team won 7 of it's 12 games. What fraction of its game did the team win?