Mathematics High School

A rectangle has a perimeter of 30cm the width of the rectangle is n cm the length of the rectangle is n+6cm
What’s the value of n

A Rectangle Has A Perimeter Of 30cm The Width Of The Rectangle Is N Cm The Length Of The Rectangle Is

Answers

Answer 1

Step-by-step explanation:

p=2(l+w)

30cm=2(n+6+n)

30cm\2=2n+6

15cm-6=2n

9cm=2n

n=4.5cm or w=4.5cm

l=w+6

l=4.5cm+6

l=10.5cm

Related Questions

what is a prime number​

Answers

Answer:

Step-by-step explanation:

Prime number is

Answer: Prime numbers are numbers that have only 2 factors: 1 and themselves. For example, the first 5 prime numbers are 2, 3, 5, 7, and 11. By contrast, numbers with more than 2 factors are call composite numbers.

Step-by-step explanation:

Solve for b.
-t = 9(t - 10)
(WILL GIVE BRAINLIEST)

Answers

Answer:

Do you mean solve for t?

If you do, the answer is 9.

Step-by-step explanation:

If we expand the equation out, we get:

-t = 9t - 90

If we move the -90 over to the left side and the -t to the right side, we get:

90 = 10t

Dividing both sides by 9, we get:

t = 9

T=9
The anser is this and its easy first multiply

i’ll give u brainliest!! what is the shape of 1, 2 and 3

Answers

Answer:

1.81.34

2.96.04

3.110.41

Step-by-step explanation:

Answer:

Shape 1: 96.04

Shape 2: 110.41

Shape 3: 75.43

Step-by-step explanation:

For shape 1, you can do 9.8*9.8 and get the answer of 96.04. For shape 2, you can do 6.1*18.1 to get the answer of 110.41. Finally for shape 3, you can find the whole circle and divide it by 4 because it is only a quarter of the circle. The radius being 9.8, you then get the area of 301.72. But since its only a quarter of a circle you divide by 4 and get 75.43.

Which table represents the function y = 4x - 3?

Answers

Answer:

B

Step-by-step explanation:

Answer:

Second table (B)

Input: 0, 1, 2

Output: -3, 1, 5

Explanation:

Given the 2D linear equation y = 4x - 3,

y must represent the output because it is the dependent variable, so x must represent the input because it is a independent variable.

7 1/2 divided by 3/4 ?
= 5
= 4
= 7
= 10

Answers

Answer:

10

Step-by-step explanation:

how do yo do this question I have to
Solve the System by Substitution:

y = x-2
x + y = 4

Answers

x=4-y would be your answer

can you help me the first person will get brainliest

Answers

Answer:

put the equations in tiger math

Step-by-step explanation:

I can’t read it , nor see it ??

but other than that have a good day !! goodluck with everything

Can someone please help me with this? I’ll give Brainliest!

Note: Show how you got the answer

Answers

Prediction should be Kaitlyn, because she uses more flour per cookie (divide the amount of cups by how many cookies there are in each batch)

I need this awser noww and I forget how to do it !! please help!

SIMPLIFY:
[tex]6 \sqrt{2} \times 5 \sqrt{2} [/tex]
​

Answers

Answer:

6√2 × 5√2 = 60

Step-by-step explanation:

6√2×5√2

6×5×√2×√2

30×(√2)². since √2²=2

30×2

60 Answer

HOPE IT HELPS YOU

MARK ME AS BRAINEST

write in slope intercept form
through (4,-1), parallel to y=x

Answers

Answer:

y=x-5 is parallel to y=x

Step-by-step explanation:

Which statements are true about points A, B, and C? Check all that apply.
theres more then one answer.


The coordinates of point A are (3, –3).

The coordinates of point B are (1, –3).

The coordinates of point C are (–2, 2).

Point C is the closest to the y-axis.

Points A and B are the same distance from the x-axis.

Answers

Answer:

A B C are all correct yuhh

Step-by-step explanation:

Select the reason why these triangles are
similar. If they are not, select "Not similar".
A. AA
B. SAS
C. SSS
D. Not similar

Answers

Answer:

B. SAS

Step-by-step explanation:

In the given diagram, it would be observed that each side of the bigger triangle are multiplied by a factor of [tex]\frac{1}{3}[/tex] to give the values of each corresponding sides of the smaller triangle. But the included angle of the two triangles are the same.

Therefore, the reason why the triangles are similar is because of side-angle-side (SAS) relations. The correct option is B.

Answer:

SAS

Step-by-step explanation:

Just Because.

Edward plans to put $75 into a savings account. He can place his money into an account represented by b(x) = 7x + 75, or into another account represented by c(x) = 75(1.06)x. Which account has the highest value in 2 years? Which account has the highest in 12 years?

Answers

Answer:

the answer is the option B

b(x) has the highest value in  years; b(x) has the highest value in  years

Step-by-step explanation:

x------> the time in years

b(x)----> the value in dollars of a saving account

c(x)----> the value in dollars of another account

we know that

Step 1

Find the value of each account for

so

----> b(x) has the highest value in  years

Step 2

Find the value of each account for

so

----> b(x) has the highest value in  years

1. What is the area of a circle with a a diameter of 20 cm in terms of pi?

2. What is the area of a circle with a radius of a 8 yd using 3.14 as pi?

3. The area of a circle in terms of pi is 49pi. What is the radius of the circle?

Help needed and it would be appreciated

Answers

Answer:

1. 100pi cm

2. 200.96 yd

3. 7

Step-by-step explanation:

1.) diameter = radius multiple by two (D = r × 2)

&

radius = diameter divided by two (r = D ÷ 2)

So

20 ÷ 2 = 10 => A = pi (10)power 2 => A = 100pi

---------------------------------------------------------------------------------------------

2.) 3.14 × (8)power2 =200.96

---------------------------------------------------------------------------------------------

3.) A = 49pi => 49pi = pi(r)power2

[ cross out the pi from both sides]

And your left with

49 = (r)power2

[square root both sides to get rid of the power]

And your left with

7 = r

solve the simultaneous equations
5x-2y=4
3x-6y=6

Answers

Hope this helps.
x=0.5
y=-3/4

1) Positive, negative, zero or undefined?

Answers

Answer:

I would say zero or undefined

Step-by-step explanation:

Answer:

c, zero slope

Rectangle describe in your own words​

Answers

Answer:

A shape with four sides with two being longer than the other two?

Step-by-step explanation:

Answer:

A geometric shape with two sets of paralel lines joined by 4 vertexes.

What is the slope of line P? And then what is the slope of line Q?

Answers

Slope of p = 3
Slope of q = -3
P= 3/1
Q= -3/1
Rise over run q is going to the left so it’s negative

Which system of linear equations appears to have a solution of (-1, 4)?
4ty
2
2
2
4

Answers

Answer:D

Step-by-step explanation:

I think your question is missed of key information, allow me to add in and hope it will fit the original one.  

Please have a look at the attached photo.  

My answer:

A solution is (-1,4) means that point of intercept is (-1,4)

<=> when x=-1 so y = 4 for both equations

From the 4 possible answers, only graph D meets the requirement.

Hope it will find you well

Answer:

Post a picture?

Please help me if you can​

Answers

Answer:

7. [tex]r^{19}[/tex]

Step-by-step explanation:

r^11 x r^8 =

r^11 + 8=

2^19

R^19 is the answer to your question

HELP PLS ill mark u brainliest

Answers

Answer:

11

Step-by-step explanation:

Since angle 11 is next to angle 12, and they should add up to 180 degrees, which makes them supplementary angles.

Answer:

The person above me is right

Are adjacent angles ever congruent?

Answers

Yes adjacent angles can be congruent

Find the value of x in the isosceles triangle

Answers

Step-by-step explanation:

Since all 3 sides of the triangle is equal, it is not only an isosceles, but an equilateral triangle.

x = 8sin60° = 6.928 or sqrt48.

That is a question about triangles.

In my answer I will show 2 ways to solve that question, ok? Let's go.

First way - Pythagoras's theorem

The line segment x divide the biggest triangle in 2 equals right triangles.

Let's choose one of them and note that is a triangule with hypotenuse equals to 8 and one cathetus equals to half of 8.

The Pythagoras's theorem says that:

[tex]\boxed{a^2 = b^2 + c^2}[/tex]

a is the hypotenuse and b and c are cathetus.

So, in our case, we know the hypotenuse and one cathetus, let's substitute that in the expression:

[tex]a^2 = b^2 + c^2\\8^2 = 4^4 + c^2\\64 = 16 + c^2\\c^2 = 64 - 16\\c^2 = 64 -16\\c^2 = 48\\c = \sqrt{48}\\c= 4\sqrt{3}[/tex]

Therefore, the value of x is [tex]4\sqrt{3}[/tex].

Second way - The equilateral triangle height

That way to solve the question is a consequence of the previous way.

That triangle has all the sides equals, so it is a equilateral triangle.The line segment x is the height of that triangle. And we can find the equilateral triangle height using that expression:

[tex]\boxed{h = \frac{S\cdot \sqrt{3} }{2} }[/tex]

h is the height and S is the triangle's side.

So, we know that the side of our triangle is 8. Let's change S value in the expression:

[tex]h = \frac{S\cdot \sqrt{3} }{2} \\h = \frac{8\cdot \sqrt{3} }{3} \\h = 4\sqrt{3}[/tex]

Thus, the value of x is [tex]4\sqrt{3}[/tex].

Note that in the 2 ways we find the same result, so that answer is correct.

I hope I've helped. :D

Enjoy your studies! \o/

Solve for X. The triangles are similar

Answers

Answer:

Step-by-step explanation:

B

B. 9

Step-by-step explanation:

35-25=10

65+10=75 (8x+3=75)

8x+3=75

8x=72

x=72/8

x=9

help me please I need help in math I suck and I need good grades

Answers

Answer:

The answer to the question provided is 60.

the answer is D ) 60 , you have to do 109-49 and u get 60 !!

Janice paid $820 plus 7% sales tax for her airfare. How much did she pay in total for her airfare?

Answers

Answer:

877.40

Step-by-step explanation:

Using the formula of A=Pi x r^2 or r= d/2

Answers

9514 1404 393

Answer:

  9π ≈ 28.3 square meters

Step-by-step explanation:

Using the given formula for the area of the circle, we find its area to be ...

  A = πr^2

  A = π(3 m)^2 = 9π m^2 ≈ 28.3 m^2

The dog has about 28.3 square meters to run around in.

Use the expression 14x + 28y + 21
(Answer both questions below)

Part A: What is the greatest common factor of the expression?

Part B: Factor the expression

Answers

Answer:

A) 7 is the greatest common factor of the expression.

B) factoring the expression [tex]14x + 28y + 21[/tex] we get [tex]\mathbf{7(2x+4y+3)}[/tex]

Step-by-step explanation:

We are given the expression: [tex]14x + 28y + 21[/tex]

Part A: What is the greatest common factor of the expression?

We need to find the greatest common factor of the expression.

The expression is divisible by 7

So, 7 is the greatest common factor of the expression.

Part B: Factor the expression

We need to factor the expression: [tex]14x + 28y + 21[/tex]

Taking 7 common:

[tex]14x + 28y + 21\\=7(2x+4y+3)[/tex]

So, factoring the expression [tex]14x + 28y + 21[/tex] we get [tex]\mathbf{7(2x+4y+3)}[/tex]

Factor this polynomial.
-3x^2-16x- 5

Answers

Answer:

B. [tex]-(3x+1) (x+5)[/tex]

Step-by-step explanation

factored the equation to solve. Hope this helps!

5 12 14 will form a acute?
True or false

Answers

No it won't. it's false

cuz proofs here.

(5²)+(12²)= (169)

√(169) = 13

.. so if 13 was the number at 14

it would have been true.

currently the answer is false

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