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Expression A: 2x+ 2 Expression B: 1 + 2x + 1 Which statement can be used to show that these expressions are equivalent? A. Each
1 answer:
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Answer:
The population of bacteria can be expressed as a function of number of days.
Population = where n is the number of days since the beginning.
Step-by-step explanation:
Number of bacteria on the first day=
Number of bacteria on the second day =
Number of bacteria on the third day =
Number of bacteria on the fourth day =
As we can see , the number of bacteria on any given day is a function of the number of days n.
This expression can be expressed generally as where n is the number of days since the beginning.
Answer:
<h2>3x + y = 1</h2>Step-by-step explanation:
Answer: The total cost is assuming the cost for 1 adult is
and the cost for 1 child is
Step-by-step explanation:
Assuming the cost for 1 adult is and the cost for 1 child is
:
and
Then the expression that gives the total cost is solved as:
Answers:
- circle
- center
- radius
- chord
- diameter
- secant
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Explanations:
- Consider a campfire and people surrounding it to warm up. The fire itself is the center of the circle, and the people around it are points on the circle's edge. Assume that each person is the same distance away from the fire. Refer to the diagram below.
- We always refer to the circle name by the center point. Think of it being like at the center of the universe, or you could think how the sun is at the center of the solar system. While technically the planets orbit in ellipses and not perfect circles, this idea still could be useful to help remember the naming convention.
- If we go back to the example in part 1, the radius is the distance from the campfire to any given person. The radius is half the diameter.
- This is not to be confused with the spelling "cord" which refers to wiring used in electronics, or in fabric fibers. If we connected any two campers with a segment, then we formed a chord. Refer back to part 1 above. Any diameter is a chord, but not the other way around.
- The diameter is a special type of chord that goes through the center. Note the endpoints of the diameter are on the circle's edge.
- A secant line is basically a chord but we've extended both endpoints off infinitely in both directions. A secant cuts the circle at 2 different points. In contrast, a tangent line touches the circle at exactly one point only.
