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Practice set d

Garden A produces 5.8 times as many vegetables as garden B. Together the gardens produce 102 pounds of vegetables. How many pounds of vegetables does garden A produce?

  1. Let x =

Garden A produces 87 pounds of vegetables.

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Sample set e

Two consecutive even numbers sum to 432. What are the two numbers?

Step 1: Let x = the smaller even number . Then x + 2 = the next (consecutive) even number since consecutive even numbers differ by 2 (as do consecutive odd numbers) .
Step 2: x + x + 2 = 432. Step 3: x + x + 2 = 432 2 x + 2 = 432 2 x = 430 x = 215. Also, since x = 215 , x + 2 = 217.
Step 4 : 215 + 217 = 432 , but 215 and 217 are odd numbers and we are looking for even numbers . Upon checking our method of solution and reexamining our equation , we find no mistakes . Step 5 : We must conclude that this problem has no solution . There are no two consecutive e v e n numbers that sum to 432 .

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Practice set e

The sum of two consecutive even numbers is 498. What are the two numbers?

The two numbers are 248 and 250.

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Exercises

Solve the following problems. Note that some of the problems may seem to have no practical applications and may not seem very interesting. They, along with the other problems, will, however, help to develop your logic and problem-solving ability.

If eighteen is subtracted from some number the result is fifty-two. What is the number?

  1. Let x =
  2. The equation is
  3. (Solve the equation.)
  4. (Check)
  5. The number is .

Step 1: Let x = the unknown quantity.

Step 2: The equation is x 18 = 52.

Step 3: (Solve the equation.) Add 18 to each side.

     x 18 + 18 = 52 + 18

     x = 70

Step 4: (Check) 70 18 = 52 ; True.

Step 5: The number is 70.

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If nine more than twice a number is forty-six, what is the number?

  1. Let x =
  2. The equation is
  3. (Solve the equation.)
  4. (Check)
  5. The number is .

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If nine less than three eighths of a number is two and one fourth, what is the number?

  1. Let x =
  2. The number is .

Step 5: The number is 30.

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Twenty percent of a number is 68. What is the number?

  1. Let x =
  2. The number is .
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Eight more than a quantity is 37. What is the original quantity?

  1. Let x =
  2. The original quantity is .

Step 5: The original quantity is 29.

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If a quantity plus 85 % more of the quantity is 62.9 , what is the original quantity?

  1. Let x = original quantity.
  2. x original quantity + .85 x 85% more = 62.9
  3. The original quantity is .
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A company must increase production by 12 % over last year’s production. The new output will be 56 items. What was last year’s output?

  1. Let P =
  2. Last year’s output was items.

Step 5: Last year's output was 50 items.

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A company has determined that it must increase production of a certain line of goods by 1 1 2 times last year’s production. The new output will be 2885 items. What was last year’s output?

  1. Last year’s output was items.
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A proton is about 1837 times as heavy as an electron. If an electron weighs 2.68 units, how many units does a proton weigh?

  1. A proton weighs units.

Step 5: A proton weighs 4923 .16 units.

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Neptune is about 30 times as far from the sun as is the Earth. If it takes light 8 minutes to travel from the sun to the Earth, how many minutes does it take to travel to Neptune?

  1. Light takes minutes to reach Neptune.
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Questions & Answers

differentiate between demand and supply giving examples
Lambiv Reply
differentiated between demand and supply using examples
Lambiv
what is labour ?
Lambiv
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Venny Reply
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devaluation
Eliyee
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WARKISA
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Lambiv
multiple choice question
Aster Reply
appreciation
Eliyee
explain perfect market
Lindiwe Reply
In economics, a perfect market refers to a theoretical construct where all participants have perfect information, goods are homogenous, there are no barriers to entry or exit, and prices are determined solely by supply and demand. It's an idealized model used for analysis,
Ezea
What is ceteris paribus?
Shukri Reply
other things being equal
AI-Robot
When MP₁ becomes negative, TP start to decline. Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of lab
Kelo
Extuples Suppose that the short-run production function of certain cut-flower firm is given by: Q=4KL-0.6K2 - 0.112 • Where is quantity of cut flower produced, I is labour input and K is fixed capital input (K-5). Determine the average product of labour (APL) and marginal product of labour (MPL)
Kelo
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Shukri
Can I ask you other question?
Shukri
what is monopoly mean?
Habtamu Reply
What is different between quantity demand and demand?
Shukri Reply
Quantity demanded refers to the specific amount of a good or service that consumers are willing and able to purchase at a give price and within a specific time period. Demand, on the other hand, is a broader concept that encompasses the entire relationship between price and quantity demanded
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Economic growth as an increase in the production and consumption of goods and services within an economy.but Economic development as a broader concept that encompasses not only economic growth but also social & human well being.
Shukri
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Jabir
What do you think is more important to focus on when considering inequality ?
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Awais Reply
sir...I just want to ask one question... Define the term contract curve? if you are free please help me to find this answer 🙏
Asui
it is a curve that we get after connecting the pareto optimal combinations of two consumers after their mutually beneficial trade offs
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In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities, where neither p
Cornelius
In economics, the contract curve refers to the set of points in an Edgeworth box diagram where both parties involved in a trade cannot be made better off without making one of them worse off. It represents the Pareto efficient allocations of goods between two individuals or entities,
Cornelius
Suppose a consumer consuming two commodities X and Y has The following utility function u=X0.4 Y0.6. If the price of the X and Y are 2 and 3 respectively and income Constraint is birr 50. A,Calculate quantities of x and y which maximize utility. B,Calculate value of Lagrange multiplier. C,Calculate quantities of X and Y consumed with a given price. D,alculate optimum level of output .
Feyisa Reply
Answer
Feyisa
c
Jabir
the market for lemon has 10 potential consumers, each having an individual demand curve p=101-10Qi, where p is price in dollar's per cup and Qi is the number of cups demanded per week by the i th consumer.Find the market demand curve using algebra. Draw an individual demand curve and the market dema
Gsbwnw Reply
suppose the production function is given by ( L, K)=L¼K¾.assuming capital is fixed find APL and MPL. consider the following short run production function:Q=6L²-0.4L³ a) find the value of L that maximizes output b)find the value of L that maximizes marginal product
Abdureman
types of unemployment
Yomi Reply
What is the difference between perfect competition and monopolistic competition?
Mohammed
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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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