Answer:
20
Step-by-step explanation:
The first equation is 50 - 2x (because you start with $50 and subtract 2 for each 30 day period)
The second equation is 40-1.5x
Set them equal to each other: 50 - 2x = 40 - 1.5x
Solve for x:
50 - 2x = 40 - 1.5 x
+2x +2x
-----------------------
50 = 40 + 0.5 x
-40 -40
-------------------
10 = 0.5 x
20 = x
So there will be 20 30-day periods until the cards will be equal in value.
Check: After 20 periods, 50 - 2(20) = $10 left
40 - 1.5(20) = also $10 left
Answer:
Turn it into y=mx+b form (slope-intercept form)
Step-by-step explanation:
If <span>EC </span>bisects ∠BED, then m∠BEC = m∠DEC
11x + 2 = 8x + 20
11x - 8x = 20 - 2
3x = 18
x = 6
m∠BED = 2 * m∠BEC
= 2(11x + 2)
= 2(11*6 + 2)
= 2(66 + 2)
= 2 * 68
= 136°
Answer:
third choice
Step-by-step explanation:
commutative property of addition
Volume is LxWxH.....so mulyiply everything
