Answer:
8 minutes.
Step-by-step explanation:
We work in fractions of the wall they can paint in 1 minute, so
1/12 + 1/24 = 1/x where x is the time it takes when working together.
Multiplying through by 24x:
2x + 1x = 24
3x = 24
x = 8 minutes.
Answer:
Step-by-step explanation:
Answer:
D.) y=10-2x
Step-by-step explanation:
this is in slope intercept form. so its usually y=mx+b.
m is the slope
b is the y intercept
so its usually y=-2x+10. but y=10-2x also works too.
X=70, 21 divide 3=7 and then add a 0 from the 210 and get 70.
River C : 200 + x
River D: x
200 + x + x = 5,540
combine like terms
200 + 2x = 5,540
subtract 200 from both sides
2x = 5,340
divide both sides by 2 to isolate the variable
x = 2, 670
River C: 200 + x = 200 + 2,670 = 2,870
River D: x = 2,670
2,870 + 2,670 = 5,540
