Which of the following expressions are equivalent to
-4/7 -8/9 +4/7+ 9/8

Choose 2 answers:
A
B
C
D
E

The circumference of a circle is 60 pi cm3what is the radius of the circle

Lydia collected two sets of data one set of data shows an outlier. which set has an outlier, and which number is the outlier?

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?