Describe and correct the error made in solving the system of equations by elimination

Two or more expressions with an equal sign is called as Equation. If Plan A: Unlimited text, talk, and data for $50 per month. Plan B: Unlimited text and data and 100 minutes of talk for $40, plus $0.20 per minute of talk after 100 minutes. Then after 150 minutes plan A and plan B are equal.

Two or more expressions with an equal sign is called as Equation.

Given that,

Plan A: Unlimited text, talk, and data for $50 per month.

Plan B: Unlimited text and data and 100 minutes of talk for $40, plus $0.20 per minute of talk after 100 minutes.

We need to equation plan A and plan B

Plan A= Plan B

50=40+0.20(m-100)

Use distributive property on Right hand side

50=40+0.20m-20

Subtract 20 from 40 on right hand side

50=20+0.20m

Subtract 20 on both sides

30=0.20m

Divide both sides by 0.20

150=m

Hence After 150 minutes of talk Plan A and Plan B are equal.

To learn more on Equation click:

https://brainly.com/question/10413253

#SPJ2

9*12.3 = 110.7

11*11.9 = 130.90

130.90 + 110.70 = 241.6 ft^2

Answer:

Step-by-step explanation:

Alright, lets get started.

The lateral area will be the area of all 4 sides.

The two sides have base length 11 feet and height of 11.9 feet.

The area of this side is : [tex]\frac{1}{2}*base*height[/tex]

The area of this side is : [tex]\frac{1}{2}*11*11.9=65.45[/tex]

The two sides have base length 9 feet and height 12.3 feet.

The area of this side is : [tex]\frac{1}{2}*9*12.3=55.35[/tex]

All 4 sides area will be : [tex]2(65.45+55.35)[/tex]

All 4 sides area = 241.6 square feet

Hence the lateral area will be 241.6 square feet  :   Answer B

Hope it will help :)

The two 8s in the number 467882 have different values based on their positions. The first 8 is worth 80 while the second 8 is worth 8.

The number 467882 has two 8s. The first 8 is in the tens place and the second 8 is in the ones place. The value of the first 8 is 8 times the value of the place it is in (or 8 x 10 = 80). The value of the second 8 is 8 times the value of the place it is in (or 8 x 1 = 8).

https://brainly.com/question/31810320

#SPJ11

Answer:

ITS NOT A) $56

Step-by-step explanation:

I took the test! GOOD LUCK!

The scientist should use 100 ounces of water and 20 ounces of the 40% salt solution to make 200 ounces of a mixture that is 5% salt.

A value or ratio that may be stated as a fraction of 100 is referred to as a percentage in mathematics. If we need to calculate a percentage of a number, we should divide it by its entirety and then multiply it by 100. The proportion therefore refers to a component per hundred. Per 100 is what the word percent means. The letter "%" stands for it.

The concepts of counting are permutation and combination, and they are used in a variety of contexts. A permutation is a list of the various configurations that can be created from the given set of items. Details are crucial in permutation because the order or sequence is crucial. The order in which the names of the three countries are written matters, whether they are written as "USA, Brazil, Australia" or "Australia, USA, Brazil" or "Brazil, Australia, USA." When combined, the names of three nations form a single unit, regardless of their chronological order

If it's 5 percent salt, 5 percent = 0.05 and 0.05*200=10 (which is 5% of 200), therefore showing us that we need 10 ounces of salt. From a 40% solution (0.4), we need to figure out how many times 0.4 goes into 10, which is 10/0.4=25, showing us that we need 25 ounces of the salt solution. 200-25=175 ounces left for water

Learn more about the percentage here:

https://brainly.com/question/24304697

#SPJ2

The student's question refers to various aspects of marathon running, including physiological processes, muscle fiber types, the effect of footwear on performance, and scientific measurements of marathon results.

The topic touches upon various aspects such as the physiological responses of marathon runners, the biomechanics of running, the influence of different shoe brands on run times, and scientific measurements of performance during a marathon.

For example, marathon runners demonstrate responsiveness and movement, two characteristics of living humans. Anatomic structures and physiological processes play a critical role in coordinating muscle action and managing internal body temperature through sweating. Additionally, the type of muscle fibers, such as slow-twitch fibers, can affect a runner's endurance, as seen in athletes with a high proportion of these fibers.

Another aspect to consider is the impact of footwear on run times. A marathon runner looking into the relationship between shoe brand and performance would examine the data collected from various runners to determine if there's any significant difference.

1 bike = 152

 7 bikes = 152*7 = 1064

1 moped = 1064/2 = $532

To find the purchase price of the futon, divide the sales tax by the tax rate. The purchase price is approximately $44.48.

To find the purchase price of the futon, we need to divide the sales tax by the tax rate. Let's call the purchase price P. We can set up the equation as: 0.77P = 34.16. To solve for P, we divide both sides of the equation by 0.77. P = 34.16 ÷ 0.77. Using a calculator, the purchase price of the futon is approximately $44.48.

https://brainly.com/question/2923300

#SPJ12

Answer:

Hope this helps

Step-by-step explanation:

Rounded to the nearest tenth, 11.4 becomes 11.4.

When rounding a number to the nearest tenth, you look at the digit in the hundredths place.

If it's 5 or greater, you round up; if it's less than 5, you round down. In 11.4, the digit in the tenths place is 4, which is less than 5.

Therefore, 11.4 remains unchanged when rounded to the nearest tenth, resulting in 11.4.

This means the number stays the same, as it's already accurately represented to the nearest tenth without needing any adjustments.

Answer:

[tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]

Step-by-step explanation:

Given :Total items = n

           Items taken at a time = r

To Find: Which expression represents the number of possible combinations of n items taken r at a time?

Solution:

We will use combination over here.

[tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]

Now Total items = n

         Items taken at a time = r

Thus expression represents the number of possible combinations of n items taken r at a time is [tex]^nC_r=\frac{n!}{r!(n-r)!}[/tex]

Answer:

9.6

Step-by-step explanation:

It is rational because it has terminating decimal expansiom

Option D (5/3) is not another way of expressing 15 out of 25 because it is greater than one and not equivalent to the simplified fraction 3/5, decimal 0.6, or percentage 60% which are all representations of the original fraction.

The student's question asks which of the following expressions is not another way of expressing 15 out of 25 insects being butterflies. To find out, we need to simplify the fraction and convert it into different forms.

Let's begin by simplifying the fraction 15/25. We can divide both the numerator (15) and the denominator (25) by their greatest common divisor, which is 5:

So the fraction reduces to 3/5. Now let's see if the other options given correspond to this fraction:

Therefore, Option D (5/3) is the correct answer because it is not another way of expressing 15 out of 25.