What is the area of the triangle in the diagram? A.
ivity2 + y 2)(022 + y2?
OB. V ( x 2² – 2₂ ²) (V2² - 4, ?)
oc. √(x² + y, ²) (*2 ² + y ₂2)
D. 2/(x2² – 2x, ²) (y 2² – 4,2)

Kayla wants to find the width, ab, of a river. she walks along the edge of the river 65 ft and marks point c. then she walks 25 ft further and marks point d. she turns 90° and walks until her location, point a, and point c are collinear. she marks point e at this location, as shown. (a) can kayla conclude that δ and δ are similar? why or why not? (b) suppose de = 15 ft. what can kayla conclude about the width of the river?

What is the 9th term in the geometric sequence described by this explicit formula? an=-6. (2)(n-1) apex

One number is 4 less than 3 times a second number. if 3 more than two times the first number is decreased by 2 times the second number, the result is 11. use the substitution method. what is the first number?