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4 years ago

Anyone can tell if this is wrong or right

Mathematics

1 answer:

Usimov [2.4K]4 years ago

5 0

Thank you for coming to Brainly with your questions!

I believe the answer is the following:

B. because if you look, the top line and the left line form a right angle, which is what the question is looking for.

I hope this helps you! Please mark me Brainliest! Lemme know if I can help with any further questions!

~Belle

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Lee las situaciones y realiza lo siguiente con cada una:

Julli [10]

Answer:

Part 1) see the explanation

Part 2) see the explanation

Part 3) see the explanation

Part 4) see the explanation

Step-by-step explanation:

<u><em>The question in English is</em></u>

Read the situations and do the following with each one:

Write down the magnitudes involved

Write which magnitude is the independent variable and which is the dependent variable

It represents the function that describes the situation

SITUATIONS:

1) A machine prints 840 pages every 30 minutes.

2) An elevator takes 6 seconds to go up two floors.

3) A company rents a car at S/ 480 for 12 days.

4) 10 kilograms of papaya cost S/ 35

Part 1) we have

A machine prints 840 pages every 30 minutes

Let

x ----> the time in minutes (represent the variable independent or input value)

y ---> the number of pages that the machine print (represent the dependent variable or output value)

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

we have a a proportional variation

The value of the constant of proportionality is equal to

$k=\frac{y}{x}$

we have

$y=840\ pages\\x=30\ minutes$

substitute

$k=\frac{840}{30}=28\ pages/minute$

The linear equation is

$y=28x$

Part 2) we have

An elevator takes 6 seconds to go up two floors.

Let

x ----> the time in seconds (represent the variable independent or input value)

y ---> the number of floors (represent the dependent variable or output value)

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

we have a a proportional variation

The value of the constant of proportionality is equal to

$k=\frac{y}{x}$

we have

$y=2\ floors\\x=6\ seconds$

substitute

$k=\frac{2}{6}=\frac{1}{3}\ floors/second$

The linear equation is

$y=\frac{1}{3}x$

Part 3) we have

A company rents a car at S/ 480 for 12 days.

Let

x ----> the number of days (represent the variable independent or input value)

y ---> the cost of rent a car (represent the dependent variable or output value)

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

we have a a proportional variation

The value of the constant of proportionality is equal to

$k=\frac{y}{x}$

we have

$y=\$480\\x=12\ days$

substitute

$k=\frac{480}{12}=\$40\ per\ day$

The linear equation is

$y=40x$

Part 4) we have

10 kilograms of papaya cost S/ 35

Let

x ----> the kilograms of papaya (represent the variable independent or input value)

y ---> the cost (represent the dependent variable or output value)

Remember that

A relationship between two variables, x, and y, represent a proportional variation if it can be expressed in the form $k=\frac{y}{x}$ or $y=kx$

In this problem

we have a a proportional variation

The value of the constant of proportionality is equal to

$k=\frac{y}{x}$

we have

$y=\$35\\x=10\ kg$

substitute

$k=\frac{35}{10}=\$3.5\ per\ kg$

The linear equation is

$y=3.5x$

6 0

3 years ago

Evaluate the expression and enter the answer as a fraction in lowest terms, using the slash (/) for the fraction bar.

Naya [18.7K]

Answer:

5/21

Step-by-step explanation:

Change division sign to multiplication and flip second fraction upside down

1/3 x 5/7 = 5/21

8 0

2 years ago

What do you call a fraction with her at normal numerator and a denominator as 0 ?

sertanlavr [38]

Its basically called null, it's not anything, nothing can be divided by 0, although 0 can be divided by anything. So the answer is that it's not a fraction.

7 0

3 years ago

Read 2 more answers

Sal is tiling his entryway. The floorplan is drawn on a unit grid. Each unit length represents 1 foot tile cost $1.25 per square

Tresset [83]

Answer: Sal will pay $77.78 to tile his entryway

Step-by-step explanation:

The image of the question is attached below.

Given each unit length = 1 foot

Tile cost per square feet = $1. 65

To find the area, split the floor shape into two shape.

One is trapezoid and the other is parallelogram.

Let's count the grid given.

The parallels sides of trapezoid are 7 ft and 4 ft, height is 7 ft.

The base and height of the parallelogram are 4 ft and 4 ft respectively.

Area of the trapezoid

Area of the trapezoid = 27.5 sq.ft

Area of the parallelogram = base × height

= 4 ft × 4 ft

Area of the parallelogram = 16 sq. ft

Total area = 27.5 sq. ft + 16 sq. ft

= 43.5 sq. ft

Cost of area per sq. ft = $1.65

Cost of area 43.5 sq. ft = 43. 5 × 1.65

= $71.775

= $71.78

Hence Sal will pay $71.78 to tile his entryway.

4 0

3 years ago

Which of the following g expressions is equal to 3x^2+27

Dafna1 [17]

Answer:

Answer is 3(x^2 + 9), when factored.

Step-by-step explanation:

4 0

3 years ago

Read 2 more answers