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Some phrases and sentences do not translate directly. We must be careful to read them properly. The word from often appears in such phrases and sentences. The word from means "a point of departure for motion." The following translation will illustrate this use.

The translation of a verbal expressions 'Fifteen is subtracted from some quantity' into mathematical expressions is x minus fifteen.

The word from indicates the motion (subtraction) is to begin at the point of "some quantity."

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Eight less than some quantity. Notice that less than could be replaced with from .
x 8

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Practice set b

Translate the following phrases and sentences into mathematical expressions or equations.

A number divided by sixteen, plus one, is five.

x 16 + 1 = 5

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Seven times two more than a number is twenty-one.

7 ( 2 + x ) = 21

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A number divided by two more than itself is zero.

x 2 + x = 0

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A number minus five is divided by twice the number plus three and the result is seventeen.

x 5 2 x + 3 = 17

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Fifty-two is subtracted from some quantity.

x 52

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An unknown quantity is subtracted from eleven and the result is five less than the unknown quantity.

11 x = x 5

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Exercises

For the following problems, translate the following phrases or sentences into mathematical expressions or equations.

A quantity less four.

a 4

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Eight more than a number.

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A number plus seven.

b + 7

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Negative five plus an unknown quantity.

5 + c

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Negative sixteen minus some quantity.

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Fourteen added to twice a number.

2 d + 14

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Ten added to three times some number.

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One third minus an unknown quantity.

1 3 e

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Twice a number is eleven.

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Four ninths of a number is twenty-one.

4 9 f = 21

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One third of a number is two fifths.

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Three times a number is nine more than twice the number.

3 g = 2 g + 9

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Five times a number is that number minus two.

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Twice a number added to six results in thirty.

2 h + 6 = 30

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Ten times a number less four results in sixty-six.

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A number less twenty-five is equal to 3.019 .

k 25 = 3.019

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Seven more than some number is five more than twice the number.

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When a number is divided by four, the result is sixty-eight.

m 4 = 68

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Eleven fifteenths of two more than a number is eight.

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One tenth of a number is that number less one.

n 10 = n 1

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Two more than twice a number is one half the number less three.

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A number is equal to itself plus four times itself.

x = x + 4 x

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Three fifths of a quantity added to the quantity itself is thirty-nine.

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A number plus seven is divided by two and the result is twenty-two.

Q + 7 2 = 22

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Ten times a number minus one is divided by fourteen and the result is one.

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A number is added to itself then divided by three. This result is then divided by three. The entire result is fifteen.

r + r 3 3 = 15

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Ten divided by two more than a number is twenty-one.

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Five divided by a number plus six is fourteen.

5 s + 6 = 14

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Twelve divided by twice a number is fifty-five.

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Twenty divided by eight times a number added to one is nine.

20 8 x + 1 = 9

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A number divided by itself, plus one, results in seven.

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A number divided by ten, plus four, results in twenty-four.

v 10 + 4 = 24

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A number plus six, divided by two, is seventy-one.

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A number plus six, divided by two, plus five, is forty-three.

w + 6 2 + 5 = 43

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A number multiplied by itself added to five is thirty-one.

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A quantity multiplied by seven plus twice itself is ninety.

7 y + 2 y = 90

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A number is increased by one and then multiplied by five times itself. The result is eighty-four.

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A number is added to six and that result is multiplied by thirteen. This result is then divided by six times the number. The entire result is equal to fifty-nine.

( z + 16 ) 13 6 z = 59

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A number is subtracted from ten and that result is multiplied by four. This result is then divided by three more than the number. The entire result is equal to six.

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An unknown quantity is decreased by eleven. This result is then divided by fifteen. Now, one is subtracted from this result and five is obtained.

x 11 15 1 = 5

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Ten less than some number.

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Five less than some unknown number.

n 5

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Twelve less than a number.

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One less than an unknown quantity.

m 1

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Sixteen less than some number is forty-two.

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Eight less than some unknown number is three.

p 8 = 3

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Seven is added to ten less than some number. The result is one.

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Twenty-three is divided by two less than twice some number and the result is thirty-four.

23 2 n 2 = 34

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One less than some number is multiplied by three less than five times the number and the entire result is divided by six less than the number. The result is twenty-seven less than eleven times the number.

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Exercises for review

( [link] ) Supply the missing word. The point on a line that is associated with a particular number is called the of that number.

graph

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( [link] ) Supply the missing word. An exponent records the number of identical in a multiplication.

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( [link] ) Write the algebraic definition of the absolute value of the number a .

| a | = { a , i f a 0 a , i f a < 0

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( [link] ) Solve the equation 4 y + 5 = 3 .

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( [link] ) Solve the equation 2 ( 3 x + 1 ) 5 x = 4 ( x 6 ) + 17 .

x = 3

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Questions & Answers

Three charges q_{1}=+3\mu C, q_{2}=+6\mu C and q_{3}=+8\mu C are located at (2,0)m (0,0)m and (0,3) coordinates respectively. Find the magnitude and direction acted upon q_{2} by the two other charges.Draw the correct graphical illustration of the problem above showing the direction of all forces.
Kate Reply
To solve this problem, we need to first find the net force acting on charge q_{2}. The magnitude of the force exerted by q_{1} on q_{2} is given by F=\frac{kq_{1}q_{2}}{r^{2}} where k is the Coulomb constant, q_{1} and q_{2} are the charges of the particles, and r is the distance between them.
Muhammed
What is the direction and net electric force on q_{1}= 5µC located at (0,4)r due to charges q_{2}=7mu located at (0,0)m and q_{3}=3\mu C located at (4,0)m?
Kate Reply
what is the change in momentum of a body?
Eunice Reply
what is a capacitor?
Raymond Reply
Capacitor is a separation of opposite charges using an insulator of very small dimension between them. Capacitor is used for allowing an AC (alternating current) to pass while a DC (direct current) is blocked.
Gautam
A motor travelling at 72km/m on sighting a stop sign applying the breaks such that under constant deaccelerate in the meters of 50 metres what is the magnitude of the accelerate
Maria Reply
please solve
Sharon
8m/s²
Aishat
What is Thermodynamics
Muordit
velocity can be 72 km/h in question. 72 km/h=20 m/s, v^2=2.a.x , 20^2=2.a.50, a=4 m/s^2.
Mehmet
A boat travels due east at a speed of 40meter per seconds across a river flowing due south at 30meter per seconds. what is the resultant speed of the boat
Saheed Reply
50 m/s due south east
Someone
which has a higher temperature, 1cup of boiling water or 1teapot of boiling water which can transfer more heat 1cup of boiling water or 1 teapot of boiling water explain your . answer
Ramon Reply
I believe temperature being an intensive property does not change for any amount of boiling water whereas heat being an extensive property changes with amount/size of the system.
Someone
Scratch that
Someone
temperature for any amount of water to boil at ntp is 100⁰C (it is a state function and and intensive property) and it depends both will give same amount of heat because the surface available for heat transfer is greater in case of the kettle as well as the heat stored in it but if you talk.....
Someone
about the amount of heat stored in the system then in that case since the mass of water in the kettle is greater so more energy is required to raise the temperature b/c more molecules of water are present in the kettle
Someone
definitely of physics
Haryormhidey Reply
how many start and codon
Esrael Reply
what is field
Felix Reply
physics, biology and chemistry this is my Field
ALIYU
field is a region of space under the influence of some physical properties
Collete
what is ogarnic chemistry
WISDOM Reply
determine the slope giving that 3y+ 2x-14=0
WISDOM
Another formula for Acceleration
Belty Reply
a=v/t. a=f/m a
IHUMA
innocent
Adah
pratica A on solution of hydro chloric acid,B is a solution containing 0.5000 mole ofsodium chlorid per dm³,put A in the burret and titrate 20.00 or 25.00cm³ portion of B using melting orange as the indicator. record the deside of your burret tabulate the burret reading and calculate the average volume of acid used?
Nassze Reply
how do lnternal energy measures
Esrael
Two bodies attract each other electrically. Do they both have to be charged? Answer the same question if the bodies repel one another.
JALLAH Reply
No. According to Isac Newtons law. this two bodies maybe you and the wall beside you. Attracting depends on the mass och each body and distance between them.
Dlovan
Are you really asking if two bodies have to be charged to be influenced by Coulombs Law?
Robert
like charges repel while unlike charges atttact
Raymond
What is specific heat capacity
Destiny Reply
Specific heat capacity is a measure of the amount of energy required to raise the temperature of a substance by one degree Celsius (or Kelvin). It is measured in Joules per kilogram per degree Celsius (J/kg°C).
AI-Robot
specific heat capacity is the amount of energy needed to raise the temperature of a substance by one degree Celsius or kelvin
ROKEEB
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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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