Hi algebra is hard please help: The expression (8x+ 4) inches represents the perimeter of a rectangle whose width is (3x − 4) inches. Find the length of the rectangle if x = 2

Answers

Answer 1

Answer:

Length = 4 inches

Step-by-step explanation:

Perimeter of a rectangle = 2(length + width)

If x = 2

Perimeter = 8x - 4

= 8(2) - 4

= 16 - 4

= 12 inches

Width = 3x - 4

= 3(2) - 4

= 6 - 4

= 2 inches

Perimeter of a rectangle = 2(length + width)

12 = 2(length + 2)

12 = 2length + 4

12 - 4 = 2 length

8 = 2 length

Length = 8/2

Length = 4 inches


Related Questions

6x – 2х + 8у – 6y simplified expression

Answers

Answer:

4x+2y

Step-by-step explanation:

6x is the answer to this question

A store manager earns
$
24.00
per hour. If the manager works
8
hours one day and donates
1
10
of the day’s earnings to charity, how much of the earnings are left?

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Answer:

192

Step-by-step explanation:

on edge

Answer:

116.1

Step-by-step explanation:

Write the equation of the line in fully simplified slope-intercept form.​

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Answer:

y=-1/2x-1

Step-by-step explanation:

Please help, it would mean the world

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1. 12x+ 21
2.88x-33
3.-15x+(-10)

pls help i’ll love u forever

Answers

The answer would be 10.2418

Miguel wrote the equation 450 h = 4,095, where h is the number of hours it took a jet flying at a
constant speed of 450 miles per hour to travel 4,095 miles. Solve for h.
h= hour(s)

Answers

Answer:

9.1

Step-by-step explanation:

Divide by 450 on both sides to find h

a.
What does the graph tell you about the boat ride?
b. For the graph find the domain and range.
C.
For the function d (above), how is the slope of the graph to the left of the vertex related to
the slope of the graph to the right of the vertex?

Answers

I’m not sure what the answer is, just trying to get points.... but I hope you find your answer :)

Kiera ordered a set of brown and green pins. She received 63 brown pins and 27 green pins. What
percentage of the pins were brown?

Answers

Answer:

Step-by-step explanation:

27

El 35 % de los estudiantes de un centro docente practica el fútbol. El 70 % de los que practican el fútbol estudia Matemáticas, así como el 25 % de los que no practican el fútbol

Answers

Answer:

El 40.75% de los alumnos del centro docente estudian matemáticas.

Step-by-step explanation:

Dado que el 35 % de los estudiantes de un centro docente practica el fútbol, y el 70 % de los que practican el fútbol estudia Matemáticas, así como el 25 % de los que no practican el fútbol, para determinar los porcentajes de estudiantes de matemáticas en el centro docente se debe realizar el siguiente calculo, suponiendo que el total de alumnos del centro sea 100:

35 x 70 / 100 = 2,450 / 100 = 24.5%

100 - 35 = 65

65 x 25 / 100 = 1,625 / 100 = 16.25%

24.5 + 16.25 = 40.75

Así, el 40.75% de los alumnos del centro docente estudian matemáticas.

Complete the equation of the line through (2,-2) and (4,1).
Use exact numbers.
Y=

Answers

Answer:

y=(3/2)x-5

Step-by-step explanation:

1=4k+b, -2=2k+b

b=1-4k, b=-2-2k

1-4k=-2-2k

k=3/2

1=4k+b

1=4(3/2)+b

b=-5

y=(3/2)x-5

Brillianst!!!!!!!please!!!!!!!

Answer:

y=(3/2)x-5

Step-by-step explanation:

PLZ HELP WILL GIVE BRAINLIEST

Answers

The first one (x+4)(x+4)

Which is the better buy: 3 shirts for $15 or 5 shirts for $20?

Answers

5 shirts for $20 would be

Step-by-step explanation:

it will

5 shirts for $20

hope it helps

choose the correct response ​

Answers

Answer:

74 hope this works if not I'm sorry

Which is equal to√4/5?
2√10/5
2√5/5
√20/5
√20/√25

Answers

Answer
The second one


Explaintion
Trust me

Answer:2√5/5

Step-by-step explanation:

Multiply 2√5  by √5√5

Combine and simplify the denominator.

2√5divide5

The result can be shown in multiple forms.

Exact Form:

2√5/5

.

a. 150km in 10 hours. How far will be travelled
in 7 hours?

Answers

Answer:

Your answer is 105km travelled in 7 hours.

Step-by-step explanation:

Divide 150km by 10 to find the amount of km travelled in 1 hour. Then multiply that answer by 7.

What is the smaller zero of y = x2 - 6x + 8?

Answers

= 7x - 8 this is it the answer

Find the measure of the given angles

Answers

Hey there!

The answer is 58 degrees

Since ΔABC ~ ΔDEF, then m∠A ~ m∠D, and m∠B ~ m∠E, and m∠C ~ m∠F. This means we can set m∠A equal to m∠D:

x + 29 = 2x

Subtract x from both sides:

29 = x

Now, we plug into the angle expressions to find their measurement:

m∠A = 29 + 29

m∠A = 58

Since they are equal, m∠A and m∠D are both 58 degrees.

Have a terrificly amazing day! :)

D=u^2/2a
u=30.6 correct to 3 significant figures
a=5.2 correct to 2 significant figures

a) Calculate the upper bound for the value of D. Give your answer correct to 6 significant figures.

The lower bound for the value of D is 88.8860 correct to six significant figures.

b)
i) By considering bounds, write down the value of D to a suitable degree of accuracy.
ii) Give a reason to your answer

Answers

a)

30.65^2/(2*5.15)=91.2061

d=91.2061

b)i)90

ii) Mathswatch is critical of anything apart from it's system so I dont know what the answer is for this one

1.4 plus what equals 0.9

Answers

Answer: 2.3

Step-by-step explanation:

Calculator

Answer:

-0.5

if 1.4-0.9=0.5

1.4+(-0.5)=0.9

as a town gets smaller the population of its high school decreases by 5% each year. The senior class has 160 students now. In how many years will it have about 100 students? Write an equation. Then solve the equation without graphing. Write an equation to represent the situation. Let n be the number of years before the class will have 100 students.

Answers

Answer:

T_n = 160(0.05)^(n - 1)

At T_n = 100, n = 1 year

Step-by-step explanation:

We will use geometric progression to solve this question.

Formula for nth term of a GP is;

T_n = ar^(n - 1)

We are told the population of its high school decreases by 5% each year.

This means r = 0.05

senior class has 160 students. Thus a = 160

Thus,T_n = 160(0.05)^(n - 1)

Where n is number of years after now.

We want to find the number of years before the class will have 100 students

Thus;

160(0.05)^(n - 1) = 100

(0.05)^(n - 1) = 100/160

(n-1)In 0.05 = In (100/160)

-2.9957(n - 1) = -0.47

(n - 1) = 0.47/2.9957

n = 1 + 0.1569

n = 1.1569

Approximating to the nearest whole number gives n = 1

Help please I will be so happy

Answers

The missing side length is 7.2 rounded to the nearest tenth

What is the area of the figure below?

Answers

Answer:

d.

Step-by-step explanation:

102 in.² should be the answer

Solve |p+3|= 5. Graph the solution set.

Answers

Answer:

2

Step-by-step explanation:

|x+3| = 5

graph it on desmos

PLEASE ANSWER ASAP!!!!Find


Find f(-2) if f(x) = x^2 + x + 7

Answers

Answer:

9

Step-by-step explanation:

a) Find the value of 1 + 3x when x = 1
b) Find the value of 7 - 2x when x = -3​

Answers

the first one is 4 and the second one is 13

List 2 pairs of Alternate Interior Angles shown in the diagram below. Show Your Work 12 34 56 78 m​

Answers

Answer:

I th8nk it means diagonal like 1 and 4 or 2 and 3

Pls help

The circle below has a diameter of 164 inches.

a) Find the circumference of the circle. Use 3.14 to approximate pi. Please show your math work step by step and don’t forget the unit. (Calculator is allowed but please write down the numbers that you enter into your calculator).

b) Find the area of the circle. Use 3.14 to approximate pi. Please show your math work step by step and don’t forget the unit. (Calculator is allowed but please write down the numbers that you enter into your calculator).

Answers

Answer:

The circle is the radius divided by equal, so it is the same as the other section meaning 16 as well

Step-by-step explanation:

Add the two ends to the result 32

Answer:

Step-by-step explanation:

yea what she said

60 as a product of its prime factors

Answers

2.3.5 = 60 are the prime factors in ascending order , give us a like if I helped :)

solve using quadratic equations (x+3)^2=25

Answers

Answer:

x=2 or x=−8

Step-by-step explanation:

The length of a rectangle can be represented by the expression (2 - 1) and the width can be
represented as (x + 3). The area of the rectangle is 12 square feet. Set up an equation that
could model this information, Solve the quadratic equation to determine a possible value for x,






PLS HELP ME AND IF YOU CAN SHOW HOW U GOT THE ANSWER IF NOT THATS OKAY!!! ILL ALSO MARK YOU BRANLIEST IF YOU HELPED ME!!! <333

Answers

Answer:

Step-by-step explanation:

The length is (x-1), not (2-1).

area = (x-1)(x+3) = 12 ft²

x²+2x-3 = 12

x²+2x-15 = 0

(x+5)(x-3) = 0

x = -5, 3

-5 is an extraneous solution, so x=3.

Length = x-1 = 2 feet

Width = x+3 = 6 feet

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