How do i solve this quadratic equation:

-5x^2x+9=0

when it asked me to find the root

Curtis has $600 and is spending $30 per week, Rachel has $200 and is saving $50 per week. In how many weeks will Curtis and Rachel have the same amount of money?

What is 19/5 mixed number

I payed 101.50 for a shirt on sale and the original price was 145 what was the percent I saved

If f (x) = - x^2 + 3x + 5 and g (x) = x^2 + 2x, which graph shows the graph of (f+g) (x)

The formula, P=V^2/R, gives the relationship between resistance (R), voltage (V) and power (P). Solve the formula for Voltage

Mrs. Barlow's math class took a test yesterday. Out of 80 students, 70% of them passed. How many of Mrs. Barlow's students passed the test?

What's the result of: (2/3) ³

Airline fares for a flight from Dallas to Austin are $30 for first class and $25 for the tourist class. If a fight had 52 passengers who paid a total of $1360, how many first class passengers were on the trip?

You have a recipe that requires 1/3 cup of sugar, but you only want to make a fourth of the recipe. How much sugar do you need to make this fraction of the recipe?

I just need clarification. If a rectangular prism has the dimensions of 10 by 4 by 6, The volume would be 240 in³ and the surface area would be 248 in² right?