Answer:
x 
4
Step-by-step explanation:
9x/2 
6(x - 3) + 3x
9x/2 6x - 18 + 3x
9x/2 9x - 18
mltiply both sides by 2
9x 18x - 36
subtract 18x from both sides
-9x -36
divide both sides by -9
flip the side when dividing by a negative
x 4
15s=2550
(divide both sides by 15)
S=170
170 students went
Answer:
3/7
Step-by-step explanation:
its 3/7 because there are 3 weekend days and there are 7 days in total in one week, so out of the week there is 3 weekend days.
i hope this helps :)
Answer:
Explanation:
Slope-intercept form formula:
For this formula we need the slope to find the slope use the slope formula:
Plug in the two points (1,-3) and (3,1)
=2
the slope is 2
Now use the slope-interpect formula and plug in the slope (m)
plug in one point I'll use (3,1)
1 = 6 +b
1-6=6-6+b
-5 = b
The equation would be:
Answer:
x=120cc volume of 7% solution
Step-by-step explanation:
Saline solution(7% solution) +
Saline solution (19% solution) = Saline solution (11% solution)
Saline solution(7% solution): (0.07)(x)
x= unknown volume
Saline solution (19% solution): (0.19)(60)
60= given volume
Saline solution (11% solution)= (0.07)(x+60)
x+60= Total volume
solve for x
(0.07)(x) + (0.19)(60) = (0.11)(x+60)
0.07x +11.4 = 0.11x + 6.6
0.11x - 0.07x = 11.4 - 6.6
0.04x = 4.8
x = 4.8/0.04
x = 120 cc volume of 7% solution
