A 35% sodium hydroxide solution is to be mixed with a 60% sodium hydroxide solution to obtain 20 liters of 40% sodium hydroxide solution. How many liters of each solution should be used?

Change the fraction into an equivalent fraction with the denominator w2 + w - 20.

Write the formula for a triangle with a height of 2 1/2 and a 13 in base

If a tree grows "a" inches each year, and the total height of a tree is f (n), where n is the number of years, write an equation for f (n)

The following recipe makes 2 dozen chocolate chip cookies 1/2 cup of butter 3/4 cup sugar 1 large egg 1 1/4 cup flour 1 cup chocolate chips 1 tsp vanilla extract If you want to make 12 cookies how much sugar would you need? Justify your answer.

8.5 rounded to nearest tenth

A newspaper reporter wants to know how popular the hobby of bird watching is in the city. He asked people at the local bird refuge if they watched birds as a hobby. Which of the following best explains whether the reporters data is valid or not?

I am very confused on how to figure out if y = 3/4x is proportional?

Alison wants to buy a mountain bike for $339.12. If she saves $28.26 each month, in how many months will she be able to buy the bike?

At 12 o'clock the temperature was 7°C. The temperature decreased by - 20°C. What is the new temperature?

Ashleys rentals charges $27.50 per hour to rent a surfboard and a wetsuit. Darlas surf shop charges $23.25 per hour to rent a surfboard plus $17 extra for a wetsuit.