Cost per ounce for the 40-ounce peanut butter is
$5.20/40 = $0.13
cost per ounce for the 15-ounce peanut butter is
$2.70 / 15 = $ 0.18
Mia saves 5 cents or $0.05
Answer:
y = -4.5
Step-by-step explanation:
Answer:
x= 3, y=0, z= 1
Step-by-step explanation:
Let's label the 3 given equations first.
2x +3y +4z= 10 -----(1)
3x +2y -4z= 5 -----(2)
x +4y +2z= 5 -----(3)
(1) +(2):
<em>This</em><em> </em><em>is</em><em> </em><em>to</em><em> </em><em>eliminate</em><em> </em><em>the</em><em> </em><em>z</em><em> </em><em>term</em><em>.</em>
2x +3y +4z +3x +2y -4z= 10 +5
5x +5y= 15
<em>Divide</em><em> </em><em>by</em><em> </em><em>5</em><em> </em><em>on</em><em> </em><em>both</em><em> </em><em>sides</em><em>:</em>
x +y= 3 -----(4)
(3) ×2:
2x +8y +4z= 10 -----(5)
(2) +(5):
<em>This</em><em> </em><em>is</em><em> </em><em>to</em><em> </em><em>eliminate</em><em> </em><em>z</em><em> </em><em>term</em><em>.</em>
3x +2y -4z + 2x +8y +4z= 5 +10
5x +10y= 15
<em>Divide</em><em> </em><em>by</em><em> </em><em>5</em><em> </em><em>throughout</em><em>.</em>
x +2y= 3 -----(6)
(6) -(4):
x +2y -(x +y)= 3 -3
x +2y -x -y= 0
y= 0
subst. y=0 into (4):
x +0= 3
x= 3
subst. x=3, y=0 into (3):
3 +4(0) +2z= 5
3 +2z= 5
2z= 5 -3
2z= 2
z= 2÷2
z= 1
Answer:
<h2>tank 1 can hold three times the water tank 2 can hold</h2>
Step-by-step explanation:
in this problem, we are expected to solve for the individual volumes of each tank
given tank 1
lenght= 30 inches
width=20 inches
height= 15 inches
volume= 30*20*12
volume= 7200 inch^3
given tank 2
lenght= 20 inches
width=12 inches
height= 10 inches
volume= 20*12*10
volume= 2400 inch^3
to get the amount of water tank 1 one can hold more than two, we need to divivde the volume of tank 1 by tank 2
= 7200/2400
=3
Therefore tank 1 can hold three times the water tank 2 can hold
Answer:
the bows are 8 inches in length
Step-by-step explanation:
he has <em>divided</em><em> </em>the ribbon into 9 equal parts so 72÷9 is the equation which equals 8 inches for every bow
