which expression is equivalent to 9x^5+3x(4x^4-3x^2)^2
a. 48x^9-24x^6+9x^5+9x^4
b. 48x^9=9x%-9x^4
c. 48x(-18x^5
d.48x^9-72x^7+36x^5

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?

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?

Which fraction is equal to 1hole and 2/5? a.3/5 b.75 c.57 d.73