Solve the quadratic (^ means to the power of)

N^2 + 21n = 0

Which two linear equations represent perpendicular lines? select two choices?

If 3 of the Roberts 4 dogs are black, what percent are NOT black

O1 The relationship between the number of $4 lunches you buy with a $100 school lunch card and the money remaining on the card

Which angle is coternal with 130 degrees?

What effect does doubling the radius of a cylinder have on the volume of the cylinder?

125 A football stadium holds 55,296 people. The seating is divided into 36 section Part A: There is an equal number of seats in each section. How many seats are in each section?

Taylor Scuff leased a new sports car and is certain she can keep under the 12,000 miles allowed a year. The $2,200 due at signing includes the title and license fee. Her monthly lease payments are $700 a month.

If you toss an unfair coin such that p (heads) = 0.45, what is the probability that you get your first heads on the 6th toss?

Adam worked 8 hours on Monday, 41⁄4 hours on Tuesday, 61⁄8 hours on Wednesday, 71⁄4 hours on Thursday, and 81⁄8 hours on Friday. Calculate the total number of hours Adam worked for the week. A. 323⁄4 B. 331⁄8 C. 333⁄4 D. 35

Find the ninth term of the geometric sequence, given the first term and common ratio. a1=1 and r=-1/3