7+14+21+28+...+105=1*7+2*7+3*7+4*7+...+15*7
15
∑7*n=7*1+7*2+7*3+7*4+...+15*7=7+14+21+28+...+105
n=1
Answer:
Step-by-step explanation:
<u>Sum of 8 fifths and 4:</u>
- 8/5 + 4 =
- 1 3/5 + 4 =
- 5 3/5
<u>7 copies of the of sum of 8 fifths and 4:</u>
- 7 × 5 3/5 =
- 7( 5 + 3/5) =
- 35 + 7(3/5) =
- 35 + 21/5 =
- 35 + 4 1/5 =
- 39 1/5 or 39.2
The answer is 26-37y over 2. I worked it out and i hope it is very helpful. I know a lot of struggle with math so hope it helps!
Answer:
Equation C: 5/8x + 2..5 = 3/8x + 1.5 + 1/4x
Step-by-step explanation:
Let us go through each of the equations one by one.
Equation A: 
This simplifies to

which has infinitely many solutions.
Equation B: 
this simplifies to


which is exactly one solution.
Equation C: 
this simplifies to


There's no way this is going to be possible; this equation has no solutions.
Equation D: 
this gives


which is exactly one solution.
Thus we see that it is equation C that has no solutions.