Unanswered Questions

Find x:

12x + 23 - 76 - 2x³ = 8

Find x:

(23x + 8) . (10x - 5) - 10 = 7

Give that \(A=x+2x+3x+4x+...\)

a) Shortern A ?

b) Find \(x\) for \(A=x+2x+3x+...=x\)?

How many numbers between 10 to 3000 are multiple 7? Please help me!

Inside the marble bag, there are 10 marbles. 4 of them are blue marbles. If Kate picks out 1 marble without looking, what is the probalility after he picks out the marble ? Express your answer as a common fraction.

Jason has $8. He going the bookstore to buy 2 books. If each book cost 1 dollar; 2 quarters; 3 dimes; 2 nickel; 4 cents, how much money he has left ?

Find the 100th number:

10, 21, 32, 43, 54, 65, 76, 87, 98, 109, ...

If x=1 is the solution px+4q=161, where both p and q are primes , find the value of p²-q

Let ABC be the angle A = 90 degrees and AB = AC. On edge AB, AC takes two points D and E such that AD = AE. From A and D straight line straight line with BE cut BC at M and N. ND cut CA in I. CM:
A, A is the midpoint of CI
b, CM = MN
Follow the 7 th grade.

25% of a 100-gallon tank is filled with a chemical that has to be in water to keep it cool for a nuclear reactor. The scientists have to add more of the chemical to the 100 gallons to get the mixture to 40% of the total container. How much more of the chemical in its 100% form has to be added to the 100 gallons to get a 40% mixture?