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Sample set b
The length of a rectangle is 4 inches more than twice its width. The area is 30 square inches. Find the dimensions (length and width).
Step 1: Let
the width. Then,
the length.
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Practice set b
The area of a triangle is 24 square meters. The base is 2 meters longer than the height. Find the base and height. The formula for the area of a triangle is
height = 6 meters, base = 8 meters
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Sample set c
The product of two consecutive integers is 156. Find them.
This factorization may be hard to guess. We could also use the quadratic formula.
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Practice set c
Sample set d
A box with no top and a square base is to be made by cutting out 2-inch squares from each corner and folding up the sides of a piece of a square cardboard. The volume of the box is to be 8 cubic inches. What size should the piece of cardboard be?
cannot equal 2 (the cut would go through the piece of cardboard). Check
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Practice set d
A box with no top and a square base is to be made by cutting 3-inch squares from each corner and folding up the sides of a piece of cardboard. The volume of the box is to be 48 cubic inches. What size should the piece of cardboard be?
10 in. by 10 in.; 2 by 2 is not physically possible.
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Sample set e
A study of the air quality in a particular city by an environmental group suggests that
years from now the level of carbon monoxide, in parts per million, in the air will be
(a) What is the level, in parts per million, of carbon monoxide in the air now?
Since the equation
specifies the level
years from now, we have
(b) How many years from now will the level of carbon monoxide be at 8 parts per million?
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Questions & Answers
calculate molarity of NaOH solution when 25.0ml of NaOH titrated with 27.2ml of 0.2m H2SO4
the study of the heat energy which is associated with chemical reactions
Kaddija
How was CH4 and o2 was able to produce (Co2)and (H2o
First twenty elements with their valences
what is the best way to define periodic table for jamb
what is the change of matter from one state to another
what is isolation of organic compounds
Read Chapter 6, section 5
Dr
Read Chapter 6, section 5
Kareem
Atomic radius is the radius of the atom and is also called the orbital radius
Kareem
atomic radius is the distance between the nucleus of an atom and its valence shell
Amos
Read Chapter 6, section 5
paulino
Bohr's model of the theory atom
when a gas is compressed why it becomes hot?
ATOMIC
It has no oxygen then
Goldyei
read the chapter on thermochemistry...the sections on "PV" work and the First Law of Thermodynamics should help..
Dr
Which element react with water
an increase in the pressure of a gas results in the decrease of its
definition of the periodic table
what were atoms composed of?
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Source:
OpenStax, Elementary algebra. OpenStax CNX. May 08, 2009 Download for free at http://cnx.org/content/col10614/1.3
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