Prove - 1 - cos^2 x = sin^2 x

A side of a square bulletin board measures 34 inches. Which of these is the closest length of a diagonal?

Julia has gone to the store to inquire about mailing packages. She is told that the cost of postage depends on the weight of the package where packages less than 10 lbs follow one model and packages greater than or equal to 10 lbs follow another

Two missiles are initially 5000 miles apart. They travel along a straight line directly towards one another, one traveling at 2000 miles per hour and the other at 1000 miles per hour. How many miles apart are they 1 minute before impact?

Circle F is congruent to circle J, and ∠EFD ≅ ∠GJH. m∠DFE = 80°. What is the measure of?

A bank wonders whether omitting the annual credit card fee for customers who charge at least $2400 in a year would increase the amount charged on its credit card. The bank makes this offer to an SRS of 250 of its existing credit card customers.

The claim is that the proportion of peas with yellow pods is equal to 0.25 (or 25%). the sample statistics from one experiment include 480 480 peas with 127 127 of them having yellow pods. find the value of the test statistic.

90% of students at a university use a backpack, while the rest do not. Of all the students, 50% carry their laptops with them and 5% carry neither a backpack nor laptop. What percentage of students carry their laptops and use a backpack?

Brianna's teacher asked her which of these three expressions are equivalent to each other 9x - 3 x - 4, 12x - 4, 5x + x - 4

I am the only number between 41 and 49 that has 5 as a factor. what number am i?

Solve the proportion: A printer can print 11 color pages in 2 minutes. How many color pages can the printer print in 7 minutes?