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4 years ago

What is meant if we say “this equation is an identity”?

Mathematics

1 answer:

scoray [572]4 years ago

4 0

Identity

An identity is an equation that is true for all values of the variables. For example:

(x+y)^2=x^2+2xy+y^2
The above equation is true for all possible values of x and y, so it is called an identity.

Strictly speaking we should use the "three bar" sign to show it is an identity as shown below. But it is very common to use the equal sign.

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A snack food manufacturer buys corn for tortilla chips from two cooperatives, one in Iowa and one in Illinois. The price per uni

aleksandrvk [35]

Answer:

a. x1 = No. of units to purchase from Iowa

x2 = No. of units to purchase from Illinois

b. Min 6x1 + 5.5x2

c. x1 + x2 ≥ 12000

x1 ≤ 8000

x2 ≥ 6000

Step-by-step explanation:

a. We can consider the variables x1 and x2 as:

x1 = No. of units to purchase from Iowa

x2 = No. of units to purchase from Illinois

b. Price per unit of Iowa corn = $6

Price per unit of Illinois corn = $5.5

Objective function that would minimize the total cost can be written as:

Min 6x1 + 5.5x2

c. The manufacturer needs at least 12000 units of corn which means that the combined number of units from Iowa and Illinois must be greater than or equal to 12000. So, we can write:

x1 + x2 ≥ 12000

The Iowa cooperative can supply up to 8000 units which means that the value of x1 must not be greater than 8000. So, we can write:

x1 ≤ 8000

Similarly, the Illinois cooperative can supply at least 6000 units which means that the value of x2 must not be less than 6000. So, we can write:

x2 ≥ 6000.

The constraints for these conditions are:

x1 + x2 ≥ 12000

x1 ≤ 8000

x2 ≥ 6000

6 0

3 years ago

Consider this equation.

AnnyKZ [126]

Answer:

I know u saw me before but the answer is B hope it helps! =)

7 0

3 years ago

Help me please...I will mark brainliest

nekit [7.7K]

The answer is A because playing sport is not affected by playing sports (for more detail go to https://www.mathsisfun.com/data/probability-events-independent.html)

If it's not A then it's B

6 0

3 years ago

Arianna earns a weekly salary of $400 plus a 6.5% commission on sales at a gift shop. How much would she make in a workweek if s

lilavasa [31]

Answer:

712

Step-by-step explanation:

400+6.5%of 4800

312+400=712

6 0

3 years ago

An automobile factory,1849 parts are made in 4 hours.what is the average rate at which parts are made per hour?

MAXImum [283]

Answer:

There are 462.25 parts being made per hour

Step-by-step explanation:

Step 1: Make an equation

An automobile factory, 1849 parts are made in 4 hours.

1849 / 4 = x

Step 2: Solve

1849 / 4 = x

462.25 = x

Answer: There are 462.25 parts being made per hour

7 0

3 years ago

Read 2 more answers