Mathematics High School

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

Find the simple Interest
I=?
P=$1300
R= 5%
T=6 years
$390
$1690
O $39000

Answers

Answer:

Step-by-step explanation:

P =$ 1300

R = 5% = 0.05

T = 6 years

I = P * R *T

= 1300 * 0.05 * 6

= $ 390

Ms. Abreau is flying to Florida for the 90° Angle Conference, where the temperature s just right. Her plane is 1200 feet in the air and the runway is 3400 feet horizontally away. What is the angle of depression formed from the plane to the runway ? Round to the nearest tenth if necessary and just the number please in your answer, we know it is degrees.

Answers

Answer:

19.4 degrees

Step-by-step explanation:

Using the SOH CAH TOA trigonometry identity

Given

Height of plane from the ground= 1200 = adjacent

Horizontal distance = 3400ft = Adjacent

Required

angle of depression theta

tan theta = opp/adj

tan theta = 1200/3400

tan theta = 12/34

tan theta = 0= arccos.3529

theta= (0.3529)

theta = 19.4 degree

Hence the angle of depression is 19.4 degrees

ASAP PLEASE HELP ME :(((

Answers

Answer:

59/500 * x/75000

500x = 4425000

x = 8850

Answer:

Step-by-step explanation:

Plzzzzzzz helppp i will give brainliest if right

Answers

Answer:

1.) 20 square inches

2.) 4.16

3.) (-1, -5) (2, -5)

Step-by-step explanation:

Given the system of equations, what is the value of the system determinant?
2x + y = 8
x - y = 10
0-1
0-2
0-3

Answers

Given:

The system of equation is

[tex]2x+y=8[/tex]

[tex]x-y=10[/tex]

To find:

The value of the system determinant.

Solution:

If two equations of a system of equations are [tex]a_1x+b_1y=c_1[/tex] and [tex]a_2x+b_2y=c_2[/tex], then the system determinant is

[tex]D=\left|\begin{matrix}a_1&b_1\\a_2&b_2\end{matrix}\right|[/tex]

[tex]D=a_1b_2-b_1a_2[/tex]

The given two equations are [tex]2x+y=8[/tex] and [tex]x-y=10[/tex].

Here, [tex]a_1=2,b_1=1,c_1=8, a_2=1,b_2=-1,c_2=10[/tex].

[tex]D=\left|\begin{matrix}2&1\\1&-1\end{matrix}\right|[/tex]

[tex]D=(2)(-1)-(1)(1)[/tex]

[tex]D=-2-1[/tex]

[tex]D=-3[/tex]

The value of the system determinant is -3. Therefore, the correct option is C.

Answer:

Answer: 7/8 or 0.875

PLEASE HELP!!!!
A farmer is building a chicken coop/ She digs some hole for the support poles. The bottom of the first hole is -6 1/4 ft from ground level. The bottom of the second hole is 1/3 as far from ground level as the first hole.

What is the position of the bottom of the second hole, relative to ground level?

A. 18 3/4 ft
B. 2 1/12 ft
C. -2 1/12 ft
B. -18 3/4 ft

Answers

The correct calculations are 3

Mrs. Sanchez went to the hair salon.
The cost of her haircut and style was
$44.35, before tax. The sales tax rate
was 8%. If she added a 20% tip to the
total amount before tax, how muchM
did she pay for the service at the
salon? (Sales tax is paid only on the
service, not the tip.)

Answers

Answer:

$53.22

Step-by-step explanation:

$53.22

Sorry If I am wrong

The mean age of 5 people in a room is 31 years.
A person enters the room.
The mean age is now 30.
What is the age of the person who entered the room?

Answers

Answer:

25 year

Step-by-step explanation:

Mean = sum/no. *of observations

Initially, number of people = 5 & let the sum of their ages be S.

=> 31 = S/5

=> 155 = S

When one more entered, number = 6. Let his age be 'a'.

Sum of ages = S + a = 155 + a

=> 30 = (155 + a)/6

=> 180 = 155 + a

=> 25 = a

24 divided my 6 + 4 to the power of 2

Answers

Answer:

.24

Step-by-step explanation:

HELP ME PLZ DUE TODAY PICTURE IS ABOVE

Which property is being demonstrated?

quotient of powers property
power of a product property
product of powers property
power of a quotient property

Answers

Answer:

Step-by-step explanation:

We see a fraction. A fraction means a division, and the result of a division is called a quotient. We know we have a quotient.

We have two choices with "quotient."

A. quotient of powers property

D. quotient of powers property

We need to choose A or D.

A. quotient of powers means a division of powers. That is what we see with the fraction. A power in the numerator, and a power in the denominator. We have a division of powers, so it is a quotient of powers.

D. power of a quotient. This is take a fraction which is a quotient, and raise the entire fraction to an exponent. This is not what we have.

Answer: A.

PLZ HELP ILL MARK BRAINLIEST!!!!!!!!!!

Answers

Answer:

it would be number two.

Step-by-step explanation:

It's basically just asking which angles are similar. look at the angels and if you use a protractor you can do exact measurements. It looks complex but its not just go step by step, stay calm. Glad to help!

Please help dababy out so I can say “less goo” again );

Answer:

2/3

Step-by-step explanation:

Two points on this line are (0, -3) and (6, 1).

Going from the first to the second, we see a change in x of 6 units and a change in y of 4 units. The slope of the line is thus m = rise / run = 4/6 = 2/3

I REALLY NEED THIS... PLEASEEE...
Solve the system by substitution.
y= 4x+22
y= −7x

Answers

Answer:

x= -2

x= 14

Step-by-step explanation:

Hope this is useful! have a wonderful night or day, God bless you!

Plz hurry will mark brainlyest.

Answers

Answer:62

Step-by-step explanation:

AMC:
all angles in a triangle add to 180°
180-56-78=46
AMC is 46°

MBD:
so because vertically opposite angles are equal, then one of the angles in the opposite triangle is 46°
once again all angles in a triangle add to 180°
180-46-62=72°

AMC is 46° and MBD is 72°

What is the area of the triangle below (in square units)?
10 mm
90mm

Answers

Answer:

450

Step-by-step explanation:

Answer:

450 square units, the formula is bxh divided by 2

Step-by-step explanation:

The value of y varies inversely with x, and y=-2 when x=4

What is the equation?

Answers

It’s the second option : y = -1/2 x

y = -1/2 x

(-2) = -1/2 (4)

-2 = -4/2

-2 = -2

Yesss -2= -2 yu welcome

Justin and his friends went to a movie that started at 7:35 p.m. Justin got home 50 minutes after the movie ended. What time did Justin get home? (elementary not highschool)

Answers

Answer:

There is no set length for the movie, but usually they're about 2 1/2 hrs so probably 10:55?

solve using they law of exponents
(2^4)^5

Answers

Answer:

2^20

Step-by-step explanation:

2^4x5

= 2^20

Do u want branlist answer this please

Answers

Answer:b

Step-by-step explanation:

a line always has 180 degrees so u just subtract 180-85=95 or what ever the angle is

it’s b
AHHHHHHHHHHHHHHHHHHHHHHHHH had to make it 20 letters

What is the slope of these ordered pairs (3,-4(6,1)

Answers

Answer:

The slope would be 5/3

Step-by-step explanation:

Let me know if u have to simplify it

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