If y is directly proportional to the square of x, and x=2 when y=12, then what is the value of y when x=3?
Thanks!
2007-09-29 15:27:46 · 5 answers · asked by Asa 1 in Science & Mathematics ➔ Mathematics
Second question:
If point B lies on AC sch that AB=4 and BC=1, what is the probability that a randomly selected point on AC will lie on BC?
2007-09-29 15:29:01 · update #1
y=kx^2
y=12, x=2
therefore k=3
when x=3
y=3*3^2
=27
1/(4+1)
=1/5
=0.2
2007-10-06 22:44:55 · answer #1 · answered by slick_licker88 3 · 0⤊ 0⤋
y=Kx**2; 12=K4 so K=3. Y=3(9)=27 when x=3.
2007-10-07 13:06:42 · answer #2 · answered by LucaPacioli1492 7 · 0⤊ 0⤋
for the second part it's 1/5
2007-09-29 22:35:28 · answer #3 · answered by tiffy8wiffy 2 · 0⤊ 0⤋
2:12 = 3:x
2x = 12 * 3
2x = 36
x = 18
2007-10-04 09:58:56 · answer #4 · answered by Jun Agruda 7 · 2⤊ 0⤋
y=kx2 12=k4--------k=3
y=3x2-------x=3-------y=3x3x3=27
2007-09-30 07:48:09 · answer #5 · answered by onur s 1 · 0⤊ 0⤋