The process used in the picture is cross multiplying. Make an x through the numbers and multiply them by each other. That's why 21 was multiplied by 14 and 49 was multiplied by n. The value of n is unknown, so it simplifies to 49n, and 14*21=21.4. So basically to recap, make an x, multiply the terms that are diagonal from each other, write both of the answers next to each other, and put an = sign in between them. If you don't understand I can try to explain differently ☺

3 0

4 years ago

a boy flying a kite is standing 30ft from a point directly under the kite. if the string to the kite is 50ft long,what is the an

MaRussiya [10]

30 × 30 + 50 × 50 = 3400

square root of 3400 is 58.31 feet.

58.31 feet is the angle of elevation of the kite.

3 0

4 years ago

Read 2 more answers

One endpoint of a line segment has coordinates represented by (x + 4, 1/2y). The midpoint of the line segment is (3, -2). How ar

Marina CMI [18]

Answer:

a. (2 - x, -4 - 1/2y)