chu vi của một hình chữ nhật là 240 cm. Tính diện tích hình chữ nhật đó, biết tỉ số độ dài hai cạnh là 5 và 7

Answers

Answer 1
(-) Tỉ số độ dài 2 cạnh là 5 và 7
=> Chiều rộng = 5:12, chiều dài = 7:12
(-) Chu vi = 240 suy ra tổng chiều dài + chiều rộng = 240 : 2 = 120
(-) Chiều rộng = 120 x 5 : 12 = 50
Chiều dài = 120 x 7 : 12 = 70
(-) Diện tích = 50 x 70 = 3500

Related Questions

is -4/5 or is-8/9 bigger

Answers

Answer:

-4/5 will be bigger.

Step-by-step explanation:

This is true as -4/5 is equal to -.8 compared to -.888888888.

Employees from a local store
donated picnic supplies for the end of the
school year picnic. They donated 20 packs
of 12 forks. 10 packs of 12 spoons, 5 packs of
10 knives, and 175 paper plates. How many
picnic items were donated?

Answers

Forks :
20 x 12 = 240

Spoons:
10 x 12 = 120

Knives :
5 x 10 = 50

Paper plates :
175

Total :
175 + 50 + 120 + 240 = 585

585 picnic items were donated

find 3 values of x and y that satisfy the equation y = 3x - 2

Answers

Answer:

x = 1, y = 1

x = -2, y = -8

x = 3, y = 7

Step-by-step explanation:

HELP PLSSS THIS IS HARD SOMEONEEE

Answers

Answer:

correct option is f(x,y) -----> ( -y,x) option 1.

Answer:

correct option is f(x,y) -----> ( -y,x) option 1.

Step-by-step explanation:

help me im having trouble on slopes

Answers

Answer:

The slope-intercept form of an equation looks like this: y=mx+b

The m stands for the slope and the b stands for the y-intercept.

We need two points from the line to write out this equation.

For example (-2,0) and (1,2)

Now that we have the slope, we can plug it into our equation: y= 2/3x + b

To get b, our y-intercept, we just need to plug in one of the points found and solve. For example (-2,0)

Now that we have both our m and b values, we can plug them in to get our equation: y=2/3x + 4/3

Step-by-step explanation:

[tex]m= \frac{y1-y2}{x1-x2} = \frac{0-2}{-2-1}[/tex]

[tex]m=\frac{-2}{-3} = \frac{2}{3}[/tex]

[tex]0=\frac{2}{3}(-2)+b[/tex]

[tex]0=-\frac{4}{3}+b\\ 0+\frac{4}{3}=-\frac{4}{3}+\frac{4}{3}+b\\ 0+\frac{4}{3}=b\\ \frac{0*3}{3}+\frac{4}{3}=b\\ \frac{4}{3}=b[/tex]

A coordinate plane with a line passing through (negative 3, 0), (0, negative 2) and (3, negative 4).
What is the equation of the graphed line written in standard form?

2x + 3y = –6
2x + 3y = 6
y equals negative StartFraction 2 Over 3 EndFraction x minus 2.
y equals StartFraction 2 Over 3 EndFraction x minus 2.

Answers

Answer:

2x+3y=-6

Step-by-step explanation:

the intercepts are (-3,0) (x intercept) and (0,-2) (y intercept)

this means that when x = 0, y = -2 and when y = 0, x = -3.

the last two are not in standard form, so we can eliminate those.

the answer also cannot be the second one because both intercepts are negative. when we solve it, the intercepts would be (3,0) and (0,2). the answer must be 2x+3y=-6.

sorry for the late reply!

Answer:

I believe its A. 2x+3y=-6

Step-by-step explanation:

1 cup is equal to 8 fluid ounces. How many fluid ounces are in 3 cups, 3 fluid ounces?

Answers

Answer:

If one cup is 8 then 3 cups is 24

Step-by-step explanation:

This can be solved by multiplying:

1*8=8

3*8=24

What is the complete factored form of f(x)=x3+5x2+4x−6?

A: f(x)=(x+3) (x-(-1+√3)) (x-(-1-√3))
B: f(x)=(x−3)(x−(−1+i√3)) (x−(−1−i√3))
C: f(x)=(x+3)(x−(−1+i√3)) (x−(−1−i√3))
D: f(x)=(x−3)(x−(−1+√3)) (x−(−1−√3))

Please answer as soon as possible!

Answers

Answer:

The answer is A

Step-by-step explanation:

I just took the test

hi so what 2+2 it is 4 right ...............................

Answers

Answer:

yessssssss have a nice day

¿Qué es un dato en estadística?

Answers

Answer:

Los datos son piezas individuales de información fáctica registradas y utilizadas con fines de análisis. Es la información en bruto a partir de la cual se crean las estadísticas. Las estadísticas son el resultado del análisis de datos: su interpretación y presentación. ... A menudo, estos tipos de estadísticas se denominan "datos estadísticos".

Step-by-step explanation:

Answer:

Un dato estadístico es cada uno de los valores que se ha obtenido al realizar un estudio estadístico

Step-by-step explanation:

pls help i need help on homework. and i dont understand:

6 = 7y - 8

please solve using inverse operations

I offer a crown and 20 points

Answers

Answer:

6=7y-8

6+8=7y-8+8(addition inverse operation)

14=7y

14/7=7y/7(division inverse operation)

2=y

Step-by-step explanation:

Answer:

y=2

Step-by-step explanation:

6=7y-8

(to get all the numbers on the right side and the letters on left side we can swap 6 with 7y)

-7y= -6-8

(since both were positive before we used the inverse method to turn both into a negative number)

-7y= -14

÷7 ÷7

(to get y on its own we divide both sides by 7)

y=2

Hope this helped you- have a good day bro cya)

8/7 divided by 5/2?

Answers

Answer:

16/35

Step-by-step explanation:

(8/7)/(5/2)

8/7 * 2/5

16/35

A street that is 250 m long is covered in snow. City workers are using a snowplow to clear the street. The snowplow has tires that are 1.7 m in diameter. How many times does a tire have to turn in traveling the length of the street?
Use the value for . Round your answer to the nearest tenth. Do not round any intermediate steps.

Answers

Answer:

The Snowplow needs to turn 44 times.

The graph below could be the graph of which exponential function

Answers

Answer:

A

Step-by-step explanation:

The graph below could be the graph of A) F(x) = 2*[tex](0.7)^x[/tex] exponential function.

The graph of the function F(x) = 2 * [tex](0.7)^x[/tex] is a decreasing exponential function. This is because the base of the exponent, 0.7, is between 0 and 1. As x increases, the value of [tex](0.7)^x[/tex] decreases, so the value of F(x) decreases.

The graphs of the other functions are all increasing exponential functions. This is because the bases of the exponents, 2, 5, and 1.4, are all greater than 1. As x increases, the value of [tex]2^x[/tex], [tex]5^x[/tex], and [tex]1.4^x[/tex] increases, so the value of the functions F(x) = 2 * [tex]2^x[/tex], F(x) = 2 * [tex]5^x[/tex], and F(x) = 2 * [tex]1.4^x[/tex] increases.

Therefore, the graph of the function F(x) = 2 * [tex](0.7)^x[/tex] is the only graph that is decreasing. So the answer is A.

Here is a table that summarizes the properties of the graphs of the four functions:

Function Base of the exponent Graph

F(x) = 2 * [tex](0.7)^x[/tex] 0.7 (between 0 and 1) Decreasing

F(x) = [tex]2^x[/tex] 2 (greater than 1) Increasing

F(x) = 2 * [tex]5^x[/tex] 5 (greater than 1) Increasing

F(x) = 2 * [tex]1.4^x[/tex]  1.4 (greater than 1) Increasing

To learn more about graph here:

https://brainly.com/question/17267403

#SPJ2

Consider the function F(x)=5x-1. Find the value of x for which the value of the function is equal to 89

Answers

Answer:

Sorry if im late

Step-by-step explanation:

The correct statements are:

The value of f(-10) = 82

The graph of the function is a parabola

The graph contains the point (20,-8)

Answer:

x=18

Step-by-step explanation:

89=5x-1

89+1=5x

90=5x

18=x

PLEASE HELP ME AND FAST! ANSWER WITH EXPLANATION PLS, ANSWER RIGHT PLS PLS PLS!
Last year, Deandre had $10,000 to invest. He invested some of it in an account that paid 7% simple interest per year, and he invested the rest in an account that paid 10% simple interest per year. After one year, he received a total of $790 in interest. How much did he invest in each account?
First Account: $?
Second Account: $?

Answers

He had $10,000 in the first account & $900 in the second account.

Please help me in transformations

Answers

Answer:

A

Step-by-step explanation:

Answer:

Reflection over y = 1

Step-by-step explanation:

help whats
2 x 3 + 4 -6r2
PLEASE ANSWER FAST

Answers

Answer:

-6r^2 + 10

Step-by-step explanation:

2 × 3 + 4 - 6r^2

= 6 + 4 - 6r^2

= -6r^2 + 10

Answer:

- 6r² + 10

Step-by-step explanation:

```````````````````````````

2 × 3 + 4 - 6r²

→ 6 + 4 - 6r²

→ 10 - 6r²

→ - 6r² + 10

```````````````````````````

Both Tyrone and Albert walk to and from school every day. Qlbert has to walk 1.25 miles farther than Tyrone does each way. If Tyrone's house id 0.6 mile from school, how far do the two boys walk altogether?​

Answers

Answer: 0.6 + 1.25 = 1.85

0.6 + 1.85 = 2.45

Find the value of X and Y​

Answers

Answer:

x = 20 , y =43

Step-by-step explanation:

1- 7x-3 + 3x-17 = 180

10x = 200, x = 20

Y = 3x-17  x is 20 so Y=60-17=43

the ratio of x and 5 minus 12
(turn this into a problem)

Answers

then is it.........!!!?

5x-12

Working simultaneously, four fudge machines complete a big order in 32 hours. All the machines at the fudge factory work at the same pace. How many hours would it take to complete the order with twice the number of working machines?

Answers

Answer:

4 Hours

Step-by-step explanation:

Let's say that the rate of the machines 1/x, because every time they complete an order, it takes them x hours. To find x, we have to add the the rates of the individual machines, which would equal the rate of the machines working together. We know that there are four machines working together at the same rate, and it took them 32 hours.

So:

1/x + 1/x + 1/x + 1/x = 1/32

1/4x = 1/32

4x = 32

x = 8

Thus, the rate of the machines is 1/8.

Now we have to find the time of the order with only half of the machines working together. This time, we don't know the combined rate, so I'll substitute it for y.

1/8 + 1/8 = 1/y

1/4 = 1/y

y = 4

The time taken to complete it is 4 hours.  

HERE IS YOUR ANSWER MATE

HAVE A GREAT DAY AHEAD

LOVE FROM INDIA

answer po plss plss plsss

Answers

Answer:

 16. 1.56

17. 0.8625

18.0.04

Step-by-step explanation:

2.675 in expanded form
54.906 in expanded form
Plz answer stat!​

Answers

2.675 = 2.000 + 0.600 + 0.075 + 0.005

54.906 = 50.000 + 4.000 + 0.900 + 0.006

what it is the equivalent of 7:2

Answers

Answer:

7:2

7/2

Step-by-step explanation:

7:2 is also equivalent to 7/2

Graph the inequality
4x-12y<24
Show all your work!

Answers

Answer:

 Slope = 0.667/2.000 = 0.333

 x-intercept = 6/1 = 6.00000

 y-intercept = 6/-3 = 2/-1 = -2.00000

Step-by-step explanation:

Rearrange:

Rearrange the equation by subtracting what is to the right of the equal sign from both sides of the equation :

                    4*x-12*y-(24)=0

Step 1: Pulling out like terms

Pull out like factors :

  4x - 12y - 24  =   4 • (x - 3y - 6)  

Equation at the end of step 1:

Step 2:

Equations which are never true:

Solve :    4   =  0

This equation has no solution.

A a non-zero constant never equals zero.

Equation of a Straight Line

Solve   x-3y-6  = 0

Tiger recognizes that we have here an equation of a straight line. Such an equation is usually written y=mx+b ("y=mx+c" in the UK).

"y=mx+b" is the formula of a straight line drawn on Cartesian coordinate system in which "y" is the vertical axis and "x" the horizontal axis.

In this formula :

y tells us how far up the line goes

x tells us how far along

m is the Slope or Gradient i.e. how steep the line is

b is the Y-intercept i.e. where the line crosses the Y axis

The X and Y intercepts and the Slope are called the line properties. We shall now graph the line  x-3y-6  = 0 and calculate its properties

Graph of a Straight Line :

Calculate the Y-Intercept :

Notice that when x = 0 the value of y is 2/-1 so this line "cuts" the y axis at y=-2.00000

 y-intercept = 6/-3 = 2/-1  = -2.00000  

Calculate the X-Intercept :

When y = 0 the value of x is 6/1 Our line therefore "cuts" the x axis at x= 6.00000

 x-intercept = 6/1  =  6.00000  

Calculate the Slope :

Slope is defined as the change in y divided by the change in x. We note that for x=0, the value of y is -2.000 and for x=2.000, the value of y is -1.333. So, for a change of 2.000 in x (The change in x is sometimes referred to as "RUN") we get a change of -1.333 - (-2.000) = 0.667 in y. (The change in y is sometimes referred to as "RISE" and the Slope is m = RISE / RUN)

   Slope     =  0.667/2.000 =  0.333  

Geometric figure: Straight Line

 Slope = 0.667/2.000 = 0.333

 x-intercept = 6/1 = 6.00000

 y-intercept = 6/-3 = 2/-1 = -2.00000

Anyone knows the answer?????????????

Answers

Answer:

No I don't know if they also know then they will tell don't know that then how to tell

Answer:

noooooooooooiiiiiiooooooooooooooooo

Solve) A = 1/2 h ( a + b ), solve for h

Answers

Step-by-step explanation:

A=½h(a+b)

h(a+b)=2A

h=2A/(a+b).

hope this helps you.

I need help! Please tell me

Answers

Answer:

y = 2x + 6

y = -1/4 x - 3

Step-by-step explanation:

We can read from the graph that the equation that slopes up to the right has y-intercept 6 and slope 2. The equation that slopes down to the right has y-intercept -3 and slope -1/4.

The equations are:

y = 2x + 6

y = -1/4 x - 3

y = 2x + 6
&
y = -1/4 x -3

Given, OA = OV, what congruency statements can
you make? Check all that apply.
BC = ZY
BE = 2x
CB = Y Z
OZDAB = ZZVX
DE = WX
O BE =ZX

Answers

Answer: Look at Explanation

Step-by-step explanation:

Your Welcome <3

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