162/60 = 2.7 heartbeats per second
Write a system of equations:
x + y = 125
20x + 15y = 2100
Solving:
x = 125 - y
20(125 - y) + 15y = 2100
2500 - 20y + 15y = 2100
2500 - 5y = 2100
-5y = 2100 - 2500
-5y = -400
y=80
x + 80 = 125
x = 125 - 80
x = 45
The first charges 45$ per hour and the second charges 80$ per hour
Answer:
k=0
Step-by-step explanation:
Step-by-step explanation:
why is it difficult to make decision in education
Answer:
809-8-90-24+5
Step-by-step explanation:
Find the value of f(2).
y = f(x)
y
10
8
6
4
15
2
-10
-8
-6
-4
-2
2
4
6
