The horizontal rows in the periodic table are known as groups.

A. True

B. False

This problem is substitution. X^-2-9X^-1+18=0

What is 1/3 divided by 9

7,801 + blank = 4,890 + 7,801

Which of the following statements is not always true? a. in a parallelogram, the diagonals are congruent. b. in a parallelogram, both pairs of opposite sides are parallel. c. in a parallelogram, both pairs of opposite sides have the same length. d.

The sum of a rational number and an irrational number is rational.

A concert is being held in a gymnasium that can hold no more than 550 people. A permanent bleacher will seat 30 people ... The event organizers are setting up 20 rows of chairs. At most, how many chairs can be in each row?

A rectangular area is to be fenced in with 600 feet of chicken wire. find the maximum area that can be enclosed.

A movie theater has a seating capacity of 235. The theater charges $5 for children, $7 for students, and $12 for adults. There are half as many adults as there are children.

What expression represents the phrase eight less than the product of a number and two

A researcher conducted a study investigating the effect of computer screen time on a person's amount of REM sleep. The researcher randomly assigned 100 people into four groups.