SOMEONE HELP ME *
Which expression and diagram represent "three times a number"?
VX
5
3x
Х
Х
X
O
3x >
х
X
х
O
3+x
х
х
x + 3 => DE

3x + 4y = 5 x- 3y = -7 solve by substitution

Atrain leaves little? rock, arkansas, and travels north at 90 kilometers per hour. another train leaves at the same time and travels south at 80 kilometers per hour. how long will it take before they are 680 kilometers? apart?

Upstream: 1.04 = x – y downstream: 2.08 = x + y aro can paddle at a speed of miles per hour. the river’s speed is miles per hour.