The seventh grade students are having an end-of-year party in the school
1 answer:
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Answer: 5 packages of invitations and 6 packages of stamps.
Step-by-step:
3x-2y=6
1) <span>Add -3x to both sides.
</span><span><span> 3x</span>−<span>2y</span></span>=<span>6
</span>+3x +3x
-----------------
<span>−<span>2y</span></span>=<span><span>−<span>3x</span></span>+<span>6
</span></span><span>
2) Divide both sides by -2.
</span>
= 
y=<span><span><span>32</span>x</span>−<span>3
</span></span>
3) Substitute the y with the equation
3x-2(32x-3)=6
3x-64x+6=6
4) Combine like terms
3x-64x+6=6
-61x+6=6
5) Subtract 6 from each side of the equation
-61x+6=6
-6 -6 (+6-5 gets crossed out)
--------------
-61x=0
6) Divide both sides by -61
x=0
============================================================
Now that you've got you x intercept, use the x value and substitute it into the
y=32x−3
y=32(0)-3
y=0-3
y=-3
(0,-3)
1) <span>Add -3x to both sides.
</span><span><span> 3x</span>−<span>2y</span></span>=<span>6
</span>+3x +3x
-----------------
<span>−<span>2y</span></span>=<span><span>−<span>3x</span></span>+<span>6
</span></span><span>
2) Divide both sides by -2.
</span>
y=<span><span><span>32</span>x</span>−<span>3
</span></span>
3) Substitute the y with the equation
3x-2(32x-3)=6
3x-64x+6=6
4) Combine like terms
3x-64x+6=6
-61x+6=6
5) Subtract 6 from each side of the equation
-61x+6=6
-6 -6 (+6-5 gets crossed out)
--------------
-61x=0
6) Divide both sides by -61
x=0
============================================================
Now that you've got you x intercept, use the x value and substitute it into the
y=32x−3
y=32(0)-3
y=0-3
y=-3
(0,-3)
<em>Complete Question:</em>
<em>Which situation illustrates quadratic equation? </em>
<em>a. The length of a rectangular board is 3m longer than its width and its perimeter is 25m. </em>
<em>b. Joey paid at least P2,000 for the shirt and pants.The cost of pants is P700 more than the shirt. </em>
<em>c. A garden's length is 7m longer than its width and the area is 18 square meter. </em>
<em>d. A lot costbP4,000 per square meter and the area is 120 square meters.</em>
Answer:
C.
Step-by-step explanation:
Required
Determine which option answers the question, correctly.
From the list of given options, only option c answers the question correctly.
This is shown below.
Represent
Length with l and Width with w, such that:
Area (A) is calculated as thus:
Substitute 7 + w for l and 18 for A.
This gives:
Open Bracket
Reorder
Subtract 18 from both sides
See that the above expression is a quadratic equation.