Answer:
DA= $800 and DB= $1200
Step-by-step explanation:
Equation I (Interest of Bank A):
IA= 0.06/year*DA *1year (DA= Deposit in Bank A)
IA= 0.06*DA
Equation II (Interest of Bank B):
IB= 0.08/year*DB *1year (DB= Deposit in Bank B)
IB= 0.08*DB
Total interest:
TI=IA+IB=$144
Total deposit:
TD= DA +DB= $2000
Adding equations I and II:
IA+IB = 0.06DA +0.08DB
$144= 0.06DA+0.08DB
(DB= $2000-DA)
When replacing DB:
$144= 0.06DA + 0.08($2000-DA)
Applying distributive property:
$144= 0.06DA + (0.08*$2000) -0.08DA
$144= -0.02DA + $160
0.02DA= $160-$144
0.02DA = $16
DA= $16/0.02
DA= $800
DB= $2000-$800
DB= $1200
Answer:
Step-by-step explanation:
(x - 7)/2 = -3
x - 7 = -6
x = 1
(y + 1)/2 = 1
y + 1 = 2
y = 1
(1, 1)
Answer:
Step-by-step explanation:
We can write the following system of equations:
Multiply the second equation by 
to isolate and solve for 
:
,
Now plug in 
into any equation to solve for 
:
.
Answer:
Donna will be paid
$
80
as interest.
Explanation:
S
I
=
P
×
R
×
T
100
Applying the formula for simple interest we get:
S
I
=
800
×
2
×
5
100
S
I
=
8
00
×
2
×
5
1
00
S
I
=
8
×
2
×
5
S
I
=
80
Step-by-step explanation:
Well, it’s quite surprising to learn that washing and drying may take up to 80 minutes.
