r-12
substitute in r=7
so 7-12 = -5
Answer:
The solution is the table 1 (see the attached figure)
Step-by-step explanation:
we know tat
Table 1
In the interval (-2.-1) -----> increase
In the interval (-1.1) -----> decrease
In the interval (1,2) -----> increase
Table 2
In the interval (-2.2) -----> decrease
Table 3
In the interval (-2.-1) -----> decrease
In the interval (-1.1) -----> increase
In the interval (1,2) -----> decrease
Table 4
In the interval (-2.2) -----> increase
therefore
The solution is the Table 1
80% = 0.80
divide the area done by the percentage:
920/0.80 = 1150
total area is 1150 square feet
Answer:
The answer to your question is a) C + J + S = 80
b) C = J + 5
c) S = 45 hours
Step-by-step explanation:
a) To represent the number of hours that they work together, just add the variables and equal them to 80.
Carlito + Juan + Sara = 80
C + J + S = 80 Equation l
b) Juan worked 5 hours more than Carlito
Juan = Carlito + 5
J = C + 5 Equation ll
c) Hours worked by Sara
S = 3J Equation lll
C = J - 5
Substitute equation ll and lll in equation l to find J
J - 5 + J + 3J = 80
5J = 80 - 5
5J = 75
J = 75/5
J = 15
-Find S
S = 3(15)
S = 45 hours
I would go with A, but I'm not positive.
