Answer:
360
Step-by-step explanation:
if the chicken sandwiches is 3/5 so
tuna sandwiches is 1-3/5=2/5
then tuna sandwiches is 240, we need solve how many all sandwiches
so 240÷2/5=600 but the question is how many chicken sandwiches were there, we only need to solve 600*3/5=360 this is answer.
if you next time don't know the question, you can tell me
Answer:
x = 2
Step-by-step explanation:
Given the 2 equations
2x + y = 3 → (1)
5x - 2y = 12 → (2)
Multiplying (1) by 2 and adding to (2) will eliminate the y- term
4x + 2y = 6 → (3)
Add (2) and (3) term by term
(5x + 4x ) +( - 2y + 2y) = 12 + 6 , that is
9x = 18 ( divide both sides by 9 )
x = 2
Answer:
us set up the following variables:
⎧
⎪
⎪
⎪
⎪
⎨
⎪
⎪
⎪
⎪
⎩
l
Length of Rectangle (cm)
w
Width of Rectangle (cm)
A
Area of Rectangle (
c
m
2
)
t
Time (s)
We are told that:
d
l
d
t
=
8
cm/s (const), and,
d
w
d
t
=
3
cm/s (const)
The Area of the rectangle is:
A
=
l
w
Differentiating wrt
t
(using the product rule) we get;
d
A
d
t
=
(
l
)
(
d
w
d
t
)
+
(
d
l
d
t
)
(
w
)
∴
d
A
d
t
=
3
l
+
8
w
So when
l
=
20
and
w
=
10
⇒
d
A
d
t
=
3
⋅
20
+
8
⋅
10
∴
d
A
d
t
=
60
+
80
∴
d
A
d
t
=
140
cm
Answer:
Dimensions are 20 X 44 feet
Step-by-step explanation:
First we need to build two equations:
For area X times Y = 880
For Perimeter 2x + 2y = 128
Now we need to solve one so we can substitute it into the other:
2x + 2y = 128 becomes
2x = 128 - 2y and then
x = 64 - y We will substitute this into the are equation
(64 - y)y = 880
64y - 
= 880
-
factor out the negative
-(
Factor:
-(y - 20)(y - 44) = 0
y-20 = 0 and y - 44 = 0
y = 20 and y = 44
Plugging these in two both of our formulas works
20 X 44 = 880 for area
2(20) + 2 (44) = 128 for perimeter
Answer:
4:14, 6:21, 8:28
Step-by-step explanation:
