ninety percent of the ninth grade students at Richard HS take algebra. if 180 ninth grade students take algebra how many ninth grade students DO NOT take algebra?
please explain ur answer.
2007-01-04 11:43:19 · 11 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
180 = 90% of what?
180/.9 = 200 total students
200 - 180 that do take it = 20 who do not.
2007-01-04 11:46:14 · answer #1 · answered by hunneebee22 4 · 0⤊ 0⤋
20
2007-01-04 11:50:43 · answer #2 · answered by Anonymous · 0⤊ 0⤋
20
2007-01-04 11:46:59 · answer #3 · answered by ivorytowerboy 5 · 0⤊ 0⤋
x = total students in 9th grade
180 = 90% x = .9 x
x = 180/.9 = 200
So 200 -180 = 20 students who do not take algebra.
2007-01-04 11:50:33 · answer #4 · answered by ironduke8159 7 · 0⤊ 0⤋
20 ... since 90% of x = 180 then .9x = 180
180/.9 = 200 ... therefore, 200 (total ninth graders) - 180 (taking algebra) = 20 (not taking algebra)
2007-01-04 11:47:47 · answer #5 · answered by icehoundxx 6 · 0⤊ 0⤋
Rewriting the sentence in the language of math,
0.9 * total = 180
So, subtract 180 from the total, and you have the number of students not taking algebra, or (180/0.9) - 180 = number not taking algebra.
2007-01-04 11:52:42 · answer #6 · answered by vrrJT3 6 · 0⤊ 0⤋
20. 180 is 90% of 200, and 200-180=20.
2007-01-04 11:46:31 · answer #7 · answered by chunsagirl77 1 · 0⤊ 1⤋
Twenty Students missed out on the joy of algebra.
2007-01-04 11:56:22 · answer #8 · answered by sublime1973 4 · 0⤊ 0⤋
20
For the answer:
if 180 = 90% (0.90)
then 180/0.90=100% which is 200
so 200-180 = 20
2007-01-04 11:46:52 · answer #9 · answered by Daremo 3 · 0⤊ 0⤋
7D^2 - 35D = 0 divide 7 from the two factors. D^2 - 5D = 0 boost into: D^2 - 5D = D(D - 5) = 0 you could examine via utilising the distributive components that's a(b+c) = ab+ac. now, it is the two D=0, or D-5=0 because of the fact something prolonged via 0 equals 0. the respond is D=0 or 5
2016-10-06 11:00:06 · answer #10 · answered by schugmann 4 · 0⤊ 0⤋