The length of a rectangle is 4 cm longer than the width, The perimeter is 80 cm. Find the length and the width. Substition Method, Elimanation Method.

Answers

Answer 1

Answer: Length = l

Width = w

2l + 2w = 80cm

l+w = 40cm

l = w+4

w+4 + w = 40cm

2w + 4 = 40cm

2w = 36cm

w = 18cm

l = 22cm

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Step-by-step explanation:

Answer 2

Answer:

L = 22, W= 18

Step-by-step explanation:

You can use an equation to solve this. Since the length is 4 more than the width, you can use L = W + 4. (L = Length, W = Width). I personally like to draw a diagram to figure out the total sides. We can add up all the sides, using our equations and adding common factors. We know the perimeter is 80 cm, so we can equal it to this. Solve for W. And finally subsitute for L.


Related Questions

If f(x) = 2x2 +5/(x-2),(the / means square root, not divide) complete the following

statement: The domain for f(x) is all real numbers___than or equal to 2.

Answers

Answer:

Greater

Step-by-step explanation:

The domain for f(x) is all real numbers greater than or equal to 2.

x>=2

slove for x 3x + 2= 11 A. 11/5 B. 3. C. 11/3 D.13/3 E.6​

Answers

Answer:

Step-by-step explanation:

if 3x+2=11

3x=11-2

3x=9

x=3

Answer:

b.3, is your answer hope this helps

Step-by-step explanation:

Which is NOT the inequality of 3x + 13 ≥ -8?

A)-8

B)-7

C)-6

D)-5

Answers

Answer:

A

Step-by-step explanation:

will give all my points and brainlist please help help
what is the Explanation of this

Answers

This statement is explaining that lack of water conservation practices and pollution of water sources can harm the environment and risk water becoming scarce. Therefore, we must be more careful with handling water sources because they could get out of hand.

Answer:

Copied from Gillruss: "This statement is explaining that lack of water conservation practices and pollution of water sources can harm the environment and risk water becoming scarce. Therefore, we must be more careful with handling water sources because they could get out of hand."

Step-by-step explanation:

sorry, couldn't resist the urge to take the points-

what is this question 2x+30=6x-12

Answers

Answer:

x=10.5

Step-by-step explanation:

2x+30=6x-12

30=4x-12

42=4x

x=10.5

Consider the equation 9 – x = 5. a. Solve the equation by first adding x to both sides. b. Solve the equation by first subtracting 9 from both sides. c. Which approach, (a) or (b), did you prefer? Explain.

Answers

Answer:

a.x=4

b.x=4

c.(b)

Step-by-step explanation:

We are given that

[tex]9-x=5[/tex]

a. First we adding x on both sides we get

[tex]9-x+x=5+x[/tex]

[tex]9=5+x[/tex]

Now, subtract 5 on both sides we get

[tex]9-5=x[/tex]

[tex]x=4[/tex]

b.

We are subtracting 9 from both sides we get

[tex]9-9-x=5-9[/tex]

[tex]-x=-4[/tex]

[tex]x=4[/tex]

We can solve equation both approach a and b

But I prefer (b) because in approach (b)

There are only 3 step in which we can get answer but in approach (a) we can get answer in 4 steps .

Hence, I prefer approach (b)

Help plz.. plz plz lmz

Answers

Answer:

seven hundred and twenty nine

A triangle has angle measurements of 56º, 73°, and 510. What kind of triangle is it?
acute
right
obtuse

Answers

It might be acute because two of the angles are acute

I will give 50 points to the first person who answers this question
Question of the Day:

Answers

Answer:

c)

Step-by-step explanation:

mark as brainleast and fo-ll-ow me

1. The current in a clothes washer is 15A when plugged into a 120V outlet. What is
the POWER of the washer? *

Answers

Answer:

Step-by-step explanation:

Power = Force × Velocity.

15*120=1800

To solve the problem we must know about resistance and power.

What is resistance?

Resistance is defined as the measurement that provides opposition to the current that travels through it.

It is given by the formula,

[tex]\rm Resistance = \dfrac{Voltage}{Current}[/tex]

The power of the washer is 1,800 watts.

Given to us

Current, I = 15 A

Voltage, V = 120V

Resistance Provided by the Washer

Using the formula of resistance to find the resistance,

[tex]\rm Resistance = \dfrac{Voltage}{Current}[/tex]

[tex]\rm Resistance = \dfrac{120\ V}{15\ A} = 8\ \Omega[/tex]

Thus, the resistance for the circuit will be 8 ohms.

Power of the washer

[tex]\rm Power = (Current)^2 \times Resistance[/tex]

[tex]P = I^2 R\\\\P = (15)^2\times 8\\\\P = 1,800\ \rm watt[/tex]

Hence, the power of the washer is 1,800 watts.

Learn more about Power:

https://brainly.com/question/6849598

Put the following lengths in ascending order, 900cm, 8.9m, 895cm, 9.1m, 12000mm, 0.0092km.

Answers

Answer: 8.9 m, 895 cm, 900 cm, 9.1 m, 0.0092 km, 12000 mm

===========================================================

Explanation:

To be able to compare these various measurements, all of them must be the same unit. Let's convert each measurement to meters. If the measurement is already in meters, then we'll move onto the next measurement.

Here are some useful conversion factors

1 m = 100 cm1 m = 1000 mm1 km = 1000 m

With those conversion factors in mind, we get the following conversions:

900 cm = (900 cm)*(1 m/100 cm) = (900/100) m = 9 m8.9 m = already in meters, moving on895 cm = 8.95 meters; divide by 100 to convert from cm to meters as shown above9.1 m = already in meters, moving on12000 mm = (12000 mm)*(1 m/1000 mm) = (12000/1000) m = 12 m0.0092 km = (0.0092 km)*(1000 m/1 km) = (0.0092*1000) m = 9.2 m

Here is the summary of the conversions:

900 cm = 9 m8.9 m = 8.9 m895 cm = 8.95 m9.1 m = 9.1 m12000 mm = 12 m0.0092 km = 9.2 m

The original list of

{900cm, 8.9m, 895cm, 9.1m, 12000mm, 0.0092km}

becomes this equivalent list

{9 m, 8.9 m, 8.95 m, 9.1 m, 12 m, 9.2 m}

in that exact order.

After converting everything to meters, we can then sort the values from smallest to largest. Doing so gets us this sorted list of

{8.9 m, 8.95 m, 9 m, 9.1 m, 9.2 m, 12 m}

Then you convert back each measurement to its original form

{8.9 m, 895 cm, 900 cm, 9.1 m, 0.0092 km, 12000 mm}

which is the final answer.

8.9m 895cm 900cm 9.1m 0.0092km 12000mm

8.9m = 890cm = 8900mm = 0.0089km
895cm = 8.95m = 8950mm = 0.00895km
900cm = 9m = 9000mm = 0.009km
0.0092km = 9.2m = 920cm = 9200m
9.1m = 910cm = 9100mm = 0.0091km
12000mm = 12m = 1200cm = 0.012km

what would be the solution for x inequality 47-4x<7

Answers

Answer:

x>10

Step-by-step explanation:

Think of this as an equation:

47-4x<7

Add 4x to both sides:

47<7+4x

Subtract 7 from both sides:

40<4x

Divide both sides by 4:

x>10

Answer:

x > 10

Step-by-step explanation:

Given

47 - 4x < 7 ( subtract 47 from both sides )

- 4x  < - 40

Divide both sides by - 4, reversing the symbol as a result of dividing by a negative quantity.

x > 10

Two-sixth of the mangoes ina basket are good. If the total number of magoes in the basket is 42 how many mangoes are bad

Answers

Answer:

28 bad mangoes

Step-by-step explanation:

Two-sixth of the mangoes ina basket are good. If the total number of magoes in the basket is 42 how many mangoes are bad

Step 1

We find the amount of mangoes that are good

Two-sixth of the mangoes in a basket are good = 2/6

Total number of mangoes = 42

Hence:

2/6 × 42 mangoes

= 14 good mangoes

Step 2

Find the number of bad mangoes

This is calculated as:

Total number of mangoes - Good Mangoes

= 42 mangoes - 14 good mangoes

= 28 bad mangoes

Therefore, the number of bad mangoes = 28

-10-7=
??????????????​

Answers

-10-7= -17

This is the answer

Answer:

-17

Step-by-step explanation:

Please help with this!

Answers

Answer:

7.5/5 = 1.5

6/1.5 = 4

X = 4

I'm pretty sure it's right

how do i solve this equation
-4p+9=-5

Answers

Answer:

p = 7/2

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtract Property of Equality

Step-by-step explanation:

Step 1: Define

-4p + 9 = -5

Step 2: Solve for p

Subtract 9 on both sides:                     -4p = -14Divide -4 on both sides:                       p = 7/2

Step 3: Check

Plug in p into the original equation to verify it's a solution.

Substitute in p:                    -4(7/2) + 9 = -5Multiply:                               -14 + 9 = -5Add:                                     -5 = -5

Here we see that -5 does indeed equal -5.

∴ p = 7/2 is the solution to the equation.

Answer:

[tex] - 4p + 9 = - 5 \\ - 4p = - 14 \\ p = \frac{ - 14}{ - 4} \\ p = \frac{7}{2} \\ \boxed{ p = 3.5}[/tex]

3.5 is the right answer.

In the school chorus, 3 9 of the students are fourth graders. In simplest form, what fraction of the students in the school chorus are fourth graders?

Answers

Answer: 1 / 3

Step-by-step explanation:

3/9 of the students in the school choir are fourth graders.

To take a fraction to its simplest form, divide both of the numbers in the fraction by their highest common factor.

3 factors = 1 , 3

9  factors = 1, 3 , 9

Highest common factor = 3

Divide both numbers by 3

= (3/3) / (9/3)

= 1 / 3

(81m^6) 1/2 (Shift +6)

Answers

Step-by-step explanation:

=

[tex] \sqrt{81 {m}^{6} } [/tex]

= 9m³

7/12 equivalent decimal

Answers

Answer:

0.583

Step-by-step explanation:

We know that

[tex]\frac{7}{12}[/tex]

is the same as

7÷12

Then using

Long Division for 7 divided by 12

and rounding to a Max of 3 Decimal Places gives us

=0.583

Peter rolls 2 fair dice and adds the results from each. Work out the probability of getting a total less than 11.

Answers

Answer:

[tex]\frac{25}{36}[/tex]

Step-by-step explanation:

Since each dice has a total of 6 numbers, Peter can get a maximum roll of 5 on each dice before the total is 11 or more. Therefore, the probability of rolling a number less than or equal to 5 each roll is 5/6. Now to find the probability of rolling a 5 or less in both rolls together so that the total is less than 11 we need to multiply the probability of each separate roll together.

[tex]\frac{5}{6} * \frac{5}{6} = \frac{25}{36}[/tex]

Therefore the probability of the total being less than 11 is [tex]\frac{25}{36}[/tex]

There is a line whose slope is 7 and whose y-intercept is 9. What is its equation in slope-intercept form?

Answers

Answer:

Y=7x+9

Step-by-step explanation:

Y=mx + b

b= y-intercept

m=slope

Substitute:

Y=7x+9

38% of the animals are dogs. 40% of the animals are spotted. 12% of the animals are spotted dogs. What percent of the animals in the store are spotted or dogs? O A. 54% O B. 66% O C. 78% O D. 80%

Answers

Answer:

C.78%

Step-by-step explanation:

Answer:c.78%

Step-by-step explanation:

12.6+4m=9.6+8m what does m=

Answers

Answer:

Step-by-step explanation:

12 frdb


Here you go 12.6 + 4m = 9.6 + 8m

Find the slope of each line

Answers

Answer:

the slope is 0

Step-by-step explanation:

Since this is a straight line, the slope is 0

The slope is 0 cause it a straight line

What is the perimeter of rectangle JKLM?
10
2
8
4
0 1 2 3 4 5 6 7 8 9 10
13)
16 units
» 18 units
15 units

Answers

Answer:

16

Step-by-step explanation:

12 = x + 3 add and sub

Answers

Answer:

do you have to solve or x?

X=9
12-3=9
Kejdirbdjdhdh

The perimeter of a square is 56cm. Work out the area of the square.

Answers

Answer:

The perimeter of a square is calculated by the formula: 4 times the length of the sides.

P=4 x a => 56 = 4a => a=56/4 = 14cm

The area of a square is calculated by the formula: squaring the length of the side.

S= a² = 196 cm

Step-by-step explanation:

If a figure is rotated 360°, how does the image compare to the preimage?​

Answers

It’s the same because 360 degrees is a full rotation
It would stay the same as it has done a full turn back to its starting position

What is 9bc−6b
written in factored form?

Answers

Answer:

3b(3c - 2) hope this helped!

Step-by-step explanation:

Answer:

3b(3c - 2)

Step-by-step explanation:

we do the factor thing, and cause they're both divisible by 3, there's your answer

Shondra buys a bedroom suite on the in-stallment plan. She makes a down payment of $200 and monthly payments of $52 each for three years. What is her total cost

Answers

Answer:

$2072

Step-by-step explanation:

Note that:

1 year = 12 months

Hence:

1 year = 12 months

3 years = x months

Cross Multiply

x = 3 × 12

x = 36 months

She makes a down payment of $200 and monthly payments of $52 each for three years.

Her total cost is represented by the expression

= $200 + $52 × m

Where m = number of monthly payments.

$200 + $52 × 36

= $200 + $1872

= $ 2072

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