If 3a+4b = 4a-4b = 21 find the value of a

There are 126 seats in the meeting. There are 9 feet in each row. There are 90 people seated feeling up to lose of seats. How many rows are empty?

Ebony is building a shelf to hold the two boxes showed what is the least with she should make the shelf the boxes are 4/5 feet the other box is 3/4 feet out

What is 2,190-2,910=

The 6 in tens place. The value of the 6 in the tenths place 962.69

Mika used these steps to solve the equation 5x-12=-2+5 (x-2) 5x-12=-2+5 (x-2). Which choice describes the meaning of her result, - 12=-12-12=-12?

How do you write 120% as a decimal and as a fraction

Find the derivative of the function. y = √ (11x + √ (11x + (√11x)))

Carmen spent $88 at the mall the money she spent was 25% of the total amount she had in her wallet

Which of the following situations can be modeled with a periodic function? A) the height of a football after it has been thrown B) the height of a person riding on an escalator C) the height of a building after it has been constructed D) the height

Solve 1/3 x = - 4/5?