Factor the expression x^2 - 4x-45

In a random sample of 90 students in first grade, the mean hours of sleep per night was 9.2 with a standard deviation of 0.37 in a random sample of 70 students in the 12th grade, the mean hours of sleep per night was 7.

Chris had 11 toys * a square = 22

Which expression is equivalent to 4 (6x + 2) - 5 (2x - 1) ?

The student council is planning an activity night to raise money. The student council will charge $5 per student to attend the activity night. write an expression that can be used to calculate the amount of money collected for n number of students.

One increased by one equals the quotient of six and three

Which statement describes the graph and system of equations? 6x+4y=2 3x+2y=1 A) Consistent and independent B) Inconsistent C) Coincident D) Not enough information

Ratio comparing 12 yds to 12 in is? __:1

Elsa's penny bank is 1/3 full. After she adds 520 pennies, it is 5/6 full. How many pennies can Elsa's bank hold?

UPS, the brown truck shipping company, has seen an increase in gasoline from about $2.30 per gallon to $3.40. What is the percentage increase? (user % symbol in answer)

A person who weighs 240 pounds burns 180 calories per mile of running. If a person burns thirty-six calories by running one mile, how much does the person weigh?