If we have two numbers A&B and we know that A times B=0 then it must follow that either A=0, or B=0 (or both)
<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.
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<em>c. A garden's length is 7m longer than its width and the area is 18 square meter.
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<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.
Answer:
y=2
x=-1
Step-by-step explanation:
This question is incomplete
Complete Question
Phrases can be used to represent the inequality 6.5x+ 1.5 ≤ 21? Select two options. The product of 6.5 and the sum of a number and 1.5 is no more than 21. The sum of 1.5 and the product of 6.5 and a number is no greater than 21. O The product of 6.5 and a number, when increased by 1.5, is below 21. The sum of 1.5 and the product of 6.5 and a number is at least 21.
Answer:
The product of 6.5 and a number, when increased by 1.5, is at most 21.
The product of 6.5 and a number, when increased by 1.5, is below 21.
Step-by-step explanation:
We are given the inequality is: 6.5x+ 1.5 ≤ 21
The sign ≤ is known as Less than or equal to.
≤ can also be said to be = at most
Therefore, the Phrases that represents the inequality
6.5x+ 1.5 ≤ 21 is:
* The product of 6.5 and a number, when increased by 1.5, is at most 21.
* The product of 6.5 and a number, when increased by 1.5, is below 21.
68.2 % of the data is within one σ, either side of the mean
95.4 % of the data is within two σs, either side of the mean
99.7 % of the data is within three σs, either side of the mean
Therefore, 0.3 % of values lie outside the range of value of three σs.
We can say this is representative of the chance that a value (in this case, the lifetime of the fan) will exceed the mean value by more than three σs.
