Ali puts 12 books in a box. She takes 4 books out of the box. Then she puts 6 books in the box. How many books are in the box now

A 23ft ladder is placed against a vertical wall of a building, with the bottom of the ladder standing on level ground 16ft from the base of the building. how high up the wall does the ladder reach? the ladder reaches nothing feet up the wall.

You have 2,088 grams of a radioactive kind of xenon. How much will be left after 18 hours if its half-life is 9 hours? So idk ... 18 divied by 9 then ... idk

How to get a radical out of the denominator?

Mia has 12 marbles, alex has 9 marbles, and micheal has 51 marbles. use the gcf and the distributive property to find the total number of marbles mia, alex and micheal have

Calculate 2 (4x+3) / 5 - 6 (x-2) / 2 = 1/2

Only 6 out of 75 trees in the park are at least 30 feet tall. what percen of the trees are under 30 feet tall

Of the 100 donated gift baskets, you raffled off 97. What fraction of the baskets are left?

Nut A fits on Bolt B. Bolt C does not fit Nut A or Nut B. Nut D fits on Bolt B. Bolt C is the same size as Bolt D, but smaller than Bolt A. Will Nut D fit Bolt A?

What is the mean of the data set? 66, 71, 75, 83, 88, 89, 90, 91 Express your answer to three decimal places. Enter your answer in the box.

9x + 35=105x-72 Can you solve it?