Use elimination to solve the system of equations.
-x + 2y = 18
x + 8y = -38
(-22, -2)
(2, 2)
(14, 2)
(-2, 14)
2007-04-30 14:18:32 · 6 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
Eliminate x by adding the equations:
10y = -20
So y = -2 and substitution gives us x = -38 + 16 = -22 (or -x = 18 + 4 and so x = -22).
So the solution is (-22, -2).
2007-04-30 14:21:50 · answer #1 · answered by Scarlet Manuka 7 · 0⤊ 0⤋
Plug the numbers in ("use elimination")
A. Works with 1st Works with 2nd
B. Doesn't work with 1st
C. Doesn't work with 1st
D. Doesn't work with 1st
The answer is A (-22, -2)
Do your homework. You'll regret it if you don't.
2007-04-30 14:25:02 · answer #2 · answered by Brandon 2 · 0⤊ 0⤋
If the diameter of the volleyball is three times the diameter of the tennis ball, the radius of the volleyball is likewise three times the radius of the tennis ball... enable's say radius of volleyball = 3r radius of tennis ball = r floor component of sphere = 4(pi)R^2 floor component of volleyball = 4(pi)(3r)^2 = 36(pi)r^2 floor component of tennis ball = 4(pi)r^2 quantity of a sphere = (4/3)(pi)R^3 quantity of volleyball = (4/3)(pi)(3r)^3 = 36(pi)r^3 floor component of tennis ball = (4/3)(pi)r^3 gazing those numbers, we see that the very fact C) is appropriate by using certainty the exterior component of the volleyball is 9 circumstances the exterior component of the tennis ball. answer is c).
2016-12-28 05:43:52 · answer #3 · answered by ? 3 · 0⤊ 0⤋
(-22, -2)
2007-04-30 14:49:57 · answer #4 · answered by theo 1 · 0⤊ 0⤋
10y=-20
y=-2
x=-22
2007-04-30 14:24:15 · answer #5 · answered by jinfeng l 2 · 0⤊ 0⤋
r u serious??? plug in the numbers........
2007-04-30 14:21:45 · answer #6 · answered by bookworm 3 · 0⤊ 0⤋