Answer:
Step-by-step explanation:
We start by subtracting 
from both sides of the second inequality:
Therefore, we conclude that:
Therefore, every point that satisfies the system has a 
-coordinate greater than 
.
Answer:
$12500
Step-by-step explanation:
use si formula
SI=ptr/100
si=5000
t=10
r=4
Ralphs is 7.5x+10
frank’s is 10x
Answer:
The answer to your question is He must get 80%
Step-by-step explanation:
Data
Scores 55%, 78%, 84%, 93% and X
Average 80%
Process
1.- Write a equation to solve this problem
- There are five scores
Score 1 = S1 = 55
Score 2 = S2 = 78
Score 3 = S3 = 84
Score 4 = S4 = 93
Score 5 = S5 = X
Equation
Average = (S1 + S2 + S3 + S4 + S5) / 5
- Solve for S5
5 Average = S1 + S2 + S3 + S4 + S5
S5 = 5 Average - S1 - S2 - S3 - S4
- Substitution
S5 = 5(80) - 55 - 78 - 84 - 93
- Simplification
S5 = 400 - 310
- Result
S5 = 90
