You will save $9
Convert 20% to decimal
Each % is 0.01 so 20×0.01=0.2
Then multiply
45×0.2=9
11 by 16
Explanation:
Set up two equations
2
x
+
2
y
=
54
x
×
y
=
176
Solving the first equation for x
2
x
+
2
y
−
2
y
=
54
−
2
y
this gives
2
x
=
54
−
2
y
Divide both sides by 2
(
2
x
2
)
=
54
−
2
y
2
This gives.
x
=
27
−
y
putting this value into the second equation gives.
(
27
−
y
)
×
y
=
176
multiplying across the parenthesis gives
27
y
−
y
2
=
176
subtracting 176 from both sides gives
is
27
y
−
y
2
−
176
=
0
multiplying by negative one gives
−
27
y
+
y
2
+
176
=
0
factoring this into y gives
(
y
−
11
)
×
(
y
−
16
)
=
0
Solving for both y's gives
y
=
11
,
y
=
16
Combine like terms the variables first. 4b-15b=-11b
-7+3=-4
-11b-4
Let the cost of each drink is $x and the cost of each hot dog is $y.
According to the given data, 3 drinks and 2 hot dogs cost $4.80. In equation form, we can write it as:

1 drink and 1 hot dog costs $2.00. In equation form, we can write it as:


Using this value of x in first equation, we get:

Thus the cost of one hot dog is $1.20
Answer:

Step-by-step explanation:
If we want to simplify the expression
, we have to note that exponent rules state that
<em>.</em>
<em />
<em>This means that if we add the exponents, that will be what we raise y to the power of</em>.

So
.
Hope this helped!