Answer:
15
Step-by-step explanation:
let r represent red marbles then white = 2r + 5 and total is 20, thus
r + 2r + 5 = 20 ( subtract 5 from both sides )
3r = 15 ( divide both sides by 3 )
r = 5 ← number of red marbles
Thus number of white = 20 - 5 = 15
A F is 309. 16 + 5 + 30 = 51. 360 - 51 = 309
Hope this helped :D
Answer:
5.5 X 10 X 4 = 220 cubic feet
Subtract 7 from -2 and 7 since 7 is currently a positive number
Your equation should now look like this:
-3x=-9
Next you have to divide by 3 on each side to get:
X=3
1/2=4/8. 3 and 4/8+ 3 and 3/8 is 6 and 7/8.
