Mathematics High School

. All CD’s are on sale for 20% this week. The CD is $9.99. What is the original price of the CD?

Answers

Answer 1

Answer:

$12.49

Step-by-step explanation:

9.99 divided by .8

Answer 2

Answer:

It is 12.48

Step-by-step explanation:

9.99/.8

Related Questions

ONE HUNDRED POINTS
Complete the proof.

Below is a drag and drop geometric proof. Complete the proof in your notebook.

Given: A = D

Prove: ACB ~ DCE

Choose from these possible answers:

Answers

Answer:

See Below.

Step-by-step explanation:

We are given that ∠A = ∠D, and we want to prove that ΔACB ~ ΔDCE.

Statements: Reasons:

[tex]1) \text{ $\angle A=\angle D$}[/tex] [tex]\text{Given}[/tex]

[tex]2) \text{ }\angle BCA=\angle ECD[/tex] [tex]\text{Vertical Angles Are Congruent}[/tex]

[tex]3) \text{ } \Delta ACB \sim \Delta DCE[/tex] [tex]\text{AA (Angle-Angle) Similarity}[/tex]

Given:

[tex] \angle \: A = \angle D[/tex]

To prove:

ACB ~ DCE

Statement:

Given,

[tex] \bf\angle \: A = \angle D [/tex]

[tex] \bf \angle \: BCA= \angle \: ECD[/tex]

[ vertical angles ]

[tex] \therefore \: ACB \sim DCE[/tex]

Reason:

By AA Criterion of similarity

Which expression is equivalent to -42 x -1.5

Answers

Answer:

beesechuurger

Step-by-step explanation:

Answer:

7*-6x-1.5

Step-by-step explanation:

. What is the distance between -30 and 20 on the number line?
*

Answers

Answer:

+50

Step-by-step explanation:

I hope it's helped........

Answer:

Step-by-step explanation:

Solve for b in the formula A=1/2h (B+b)

Answers

It’s going to be 1/2B3

Solution

Switch sides so that the right side is the left side

1/2h (B + b) = A

Now multiply both sides by 2

2 • 1/2h (B + b) = A • 2

Simplify the equation

h (B + b) = 2A

Now divide both sides by h

(h (B + b))/h = 2A/h

Simplify the equation

B + b = 2A/h

Subtract B from both sides

B + b - B = 2A/h - B

Simplify the equation

b = 2A/h - B

Therefore b = 2A/h - B

solve for x
x - 8 = sqrt2x+8

Answers

Answer:

x=4

Step-by-step explanation:

to get rid of the square root on the right you square both sides so

2x+8=x^2

Then bring

2x+8

to the left so you have 0=(x^2)−2x+8

Now you can do the quadratic formula to find the zeroes

Answer:

x = {14, 4}

Step-by-step explanation:

Given equation:

x - 8 = √2x+8

Square both sides

(x - 8)² = (√2x+8)²x² - 16x + 64 = 2x + 8x² - 18x + 56 = 0x² - 2*9x + 81 = 25(x - 9)² = 5²x - 9 = ± 5x = 9 ± 5x = 14 or x = 4

Triangle ABC is translated and then reflected to map triangle A"B"C" as shown.
C"
с
x
B.
Which of the following postulates or theorems proves the triangles congruent?
AA Postulate
HL Postulate
ASA Theorem
SSA Theorem

Answers

Answer:

Step-by-step explanation:

Given: Trapezoid EFGH with vertices El-5.3).(-3.3). G(-1.1). and H(-6.1) as shown in the diagram below.
E
F
H
G
Trapezoid EFGH is rotated 180° clockwise about the origin to yield trapezoid E'F'G'H". Which ordered pair gives the coordinates of vertex E'?
(3,5)
(3.-5)
(5.3)
O

Answers

Answer: 5, -3

Step by Step Explaination:

Help ASAP please!!!!!

Answers

Answer:

f= 2x+3

Step-by-step explanation:

Let's solve for f.

fx=2x+3

Step 1: Divide both sides by x.

2x+3

Rafael rented a truck for one day. There was a base fee of $14.99, and there was an additional charge of 87 cents for each mile driven. Rafael had to pay
S255.98 when he returned the truck. For how many miles did he drive the truck?

Answers

Answer: Rafael drove 277 miles

Step-by-step explanation:

255.98 - 14.99 = 240.99

240.99 / .87 = 277.

Please help me on this quick the work is due today

Answers

Answer:

1. 52 degrees 2. D

Step-by-step explanation:

1. The interior angles of a triangle add up to 180, so you can do 180 - 36 - 92 to find the third angle.

180 - 36 - 92 = 52 degrees

2. the angle XYZ has to equal the sum of the angles WXY and XWY. This means that 115 = 45 + XWY

115 - 45 = 72

XWY = D. 70 degrees

Solve for W:
P = LW

Answers

Answer:

W=P/L

Step-by-step explanation:

help meh for brainlist

Answers

Answer:

A. 312

Step-by-step explanation:

For the rectangle center multiply 6*4=24

Area of a trapezoid: ((a+b)/2)h so with this we can determine that the area of one side is 40, since there are 2 sides the area would be 80 total

24+80=104

For 3 bows: 104*3=312

What did Common Sense refer to in the American Revolution?

the belief that the French had no role to play in North America

the belief that the British had no right to tax in the colonies

the pamphlet by Thomas Paine that convinced many of the need for independence

the right-thinking of ordinary colonists

Answers

The belief that the British had no right to tax in the colonies

100 POINTS!!! PLEASE HELP ME

Answers

Step-by-step explanation:

For question 30, the first choice is not necessarily true. I attached a picture of what *could* be the parallelogram.

The first choice is true ONLY if the parallelogram is a square.

The second choice is not necessarily true either. It is true ONLY if the parallelogram is a rhombus (a square is also a rhombus, just for reference)

But opposite sides of a parallelogram are always equal

So the answer to question 30 are the first and second choices.

For question 31:

remember what I said about how opposite sides of a parallelogram are always equal? Well opposite angles are also always equal.

So angle BKX = angle BWX = angle XWB = 114 degrees

Angle BKW = angle XWK (using parallel lines) = angle XWB - angle BWK = 114 - 22 = 92 degrees

Angle WBX = angle BXK (using parallel lines too) = angle WXK - angle WXB.

Consecutive angles in a parallelogram add up to 180. So angle WXK + angle XWK = 180. angle WXK = 180 - angle XWK = 180 - 114 = 66 degrees.

angle WDB + angle WBX + angle BWK = 180 because it's a triangle

angle WDB + 66 (just figured it out) + 22 (given) = 180 degrees

angle WDB = 180 - 66 - 22 = 92 degrees

I hope I didn't do anything wrong lol

but I prolly did XD

Answer:

angle WDB + angle WBX + angle BWK = 180 because it's a triangle

angle WDB + 66 + 22 (given) = 180 degrees

angle WDB = 180 - 66 - 22 = 92 degrees

Step-by-step explanation:

Which of the following expressions are equivalent to 6 + (-4) - 5
Choose 2 answers:

(Choice A)
-(-6+4)-5

(Choice B)
6-4-(-5)

(Choice C)
6-(4+5)

(Choice D)
6+4-56

(Choice E)
E
-(-6)+(-4)-(-5)

Answers

Answer:

B and C

Step-by-step explanation:

All you need to do is find the answer for all of them and see which ones match

Original:

6 + (-4) - 5

6 - 4 - 5

2 - 5

-3

This is the answer for the original expression, now we need to see which one is the correct match....

A. -(-6 + 4 ) - 5

2 negatives being subtracted gives you a positive

6 + 4 - 5

10 - 5

Incorrect, so now we know its not A

B. 6 - 4 - ( -5)

Again 2 negatives give you a positive

6 - 4 + (5)

6 - 9

-3

Correct, so now we know its B

C. 6 - (4 + 5)

PEMDAS so do the parenthesis first

6 - 9

-3

Correct, so now we it's C.

D. 6 + 4 - 56

10 - 56

-46

Incorrect, so now we know its not D

E. -(-6) + (-4) - (-5)

Again, 2 negatives equal a positive

6 - 4 + 5

2 + 5

Incorrect so now we know its not E

The correct answer is C

Hope this helped!

Have a supercalifragilisticexpialidocious day!

GCF for each pair number 22,55

Answers

It’s 11, 2 x 11 is with is the factorization

Answer:

11 is the GCF for both 22 and 55.

Step-by-step explanation:

I looked it up.

Write the slope-intercept form of the line through the points (4,-5) and (2, -1).

Answers

slope intercept form is y=mx+b
to solve for m (slope) you must first subtract y2-y1 and x2-x1 then divide your answers

-1 - -5 = 4 (y)
2 - 4 = -2 (x)
4/-2 = -2

so your slope is -2

next plug in your slope and the point you choose

-1 = -2(2) + b
or
-5 = -2(5) +b

Solve the radical equation [tex]\sqrt{2-x} = x-2[/tex]

Answers

Answer:

x = 1 or 2

Step-by-step explanation:

[tex] \sqrt{2 - x} = x - 2[/tex]

Squaring both the sides ,

[tex] = > { (\sqrt{2 - x}) }^{2} = {(x - 2)}^{2} [/tex]

[tex] = >2 - x = {x}^{2} - 4x + 4[/tex]

Adding like terms ,

[tex] = > {x}^{2} - 4x + x + 4 - 2 = 0[/tex]

[tex] = > {x}^{2} - 3x + 2 = 0[/tex]

Factorising the eqn. ,

[tex] = > {x}^{2} - x - 2x + 2 = 0[/tex]

[tex] = > x(x - 1) - 2(x - 1) = 0[/tex]

[tex] = > (x - 1)(x - 2) = 0[/tex]

Here x will have 2 values .

1) [tex]x - 1 = 0[/tex]

[tex] = > x = 1[/tex]

2) [tex]x - 2 = 0[/tex]

[tex] = > x = 2[/tex]

The faces of a cube are

Answers

The answer would be A :)

9 years ago, Tarah opened a savings account with her bank. She started with a balance of
$359. She made an investment of 8% each year on the amount she originally put in. Select
true or false for the following statement.
Tarah has a new total amount of $617.48 in her saving account.
(1 Point)
True
False

Answers

Answer:

The answer is False, after 9 years there would be $717.64 in the account.

how can the number 39 be divided into two parts in order that the sum of 2 upon 3 of one part and 3 upon 4 of the other part is 28

Answers

Answer:

The two numbers are 15 and 24

Step-by-step explanation:

Let us assume the two parts be x and y

So according to the question

x + y = 39

(2 ÷ 3) x + (3 ÷ 4)y = 28

8x + 9y = 28 × 12

8x + 9 × (39 - x) = 336

-x = 336 - 351

x = 15

And, y = 39 - 15

= 24

Hence, the x and y is 15 and 24 respectively

Tin
This is part 1 of 2 for your test today 01/22.
Make sure to complete second part.
15
D Question 1
1 pts
Greg walked to the store and then retumed home. This graph shows the distance Greg was from his house at different times during his walk.
Which statement is true?
Greg walked home from the store at a slower rate than he walked to the store.
Greg was at the store for 20 minutes.
Greg walked home from the store at the same rate he walked to the store,
Greg walked to the store at a slower rate than he walked home from the store,

Answers

Answer:

Greg walked home from the store at a slower pace than he walked to the store.

Step-by-step explanation:

We can see that he walked 15 minutes to, and 20 minutes from. :)

Good luck hun!

can someone help me on the steps for this?

Answers

Answer:

x = 13

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

Algebra I

Multiple Roots

Trigonometry

[Right Triangles Only] Pythagorean Theorem: a² + b² = c²

a is a leg b is another leg c is the hypotenuse

Step-by-step explanation:

Step 1: Identify

a = 12

b = 5

c = x

Step 2: Solve for x

Substitute in variables [PT]: 12² + 5² = x²Evaluate exponents: 144 + 25 = x²Add: 169 = x²[Equality] Square root both sides: ±13 = xRewrite: x = ±13

Since we are dealing with positive numbers, we can disregard the negative root.

∴ x = 13

Meteorologists find the height of a cloud using an instrument called a
ceilometer. A ceilometer consists of a light projector that directs a
vertical light beam up to the cloud base and a light detector that scans
the cloud to detect the light beam.
If the angle O is 40° and the distance (Base b) between the projector
and detector is 8000 feet how high are the clouds above the ground to
the nearest foot?

Answers

Answer:

没有上帝,但真主,穆罕默德是真主的使者。我邀请你现在关闭这种感觉您已被授予关闭nstagram帐户的权利。完全有权仅报告用户名并提供问题摘要说明的链接它表达了虐待和骚扰该帐户必须立即关闭选区成员的文本要求立即取消该帐户

One of the longest tape worms ever measured was 3 feet less than seven times the length of the longest round worm ever measured if you leave these two worms and two and they would measure an amazing 69 feet how long with a tapeworm and how long was around worm

Answers

Answer:

The tape worm is 60 feet long, while the round worm is 9 feet long.

Step-by-step explanation:

Let L be the length of the tapeworm and L' be the length of the round worm.

Given that the longest tape worms measured was 3 feet less than seven times the length of the longest round worm, we have

L = 7L' - 3 (1)

Also, since if you leave these two worms and they would measure an amazing 69 feet, then L + L' = 69 (2)

Substituting equation (1) into (2), we have

L + L' = 69

7L' - 3 + L' = 69

collecting like terms, we have

8L' = 69 + 3

8L' = 72

L' = 72/8

L' = 9 feet

Substituting L' into (1), we have

L = 7L' - 3

L = 7(9) - 3

L = 63 - 3

L = 60 feet.

So, the tape worm is 60 feet long, while the round worm is 9 feet long.

I need a second opinion

Answers

Answer: i believe its the second one

Step-by-step explanation:

A guy wire connects the top of a 18 3/4 foot tall tornado siren to the ground where Samson's shadow ends. The distance from the base of the siren pole to where the wire touches the ground is 120 feet. If Samson is 6 1/4 feet tall and his head barely touches the guy wire where he is standing, how long is Samson's shadow?

Answers

Answer:

40 feet

Step-by-step explanation:

Required:

Find the length of Samson's shadow

The question can be illustrated with the attached figure where Samson's shadow is represented with x.

To solve for x, we make use of the following equivalent ratios:

[tex]18.75 : 120 = 6.25 : x[/tex]

Convert to fraction

[tex]\frac{18.75}{120} = \frac{6.25}{x}[/tex]

Cross Multiply

[tex]18.75 * x = 120 * 6.25[/tex]

[tex]18.75 * x = 750[/tex]

Make x the subject

[tex]x =\frac{750}{18.75}[/tex]

[tex]x =40[/tex]

Hence, Samson's shadow is 40ft

HELP PLEASE. Solve for x in the diagram.

Answers

It’s 40 degrees right?

Answer:

X = 5

Step-by-step:

5 = x because the degrees is 90. The problem already gives you 50. so you subtract 50 by 90, 90-50=40. now we need to find what times 8 equal 40, and 5x8=40. I hope this helps!!!!

Please help me solve for x

Answers

Answer:

28/5 would be the most simplified version. but it can also be 5 3/5.

Step-by-step explanation:

PLZ do it right i will give brainlest and thanks so do all 3 plz Find each product. Write each answer in simplest form.

Answers

4. 13/30
5. 11 7/15 or 172/15
6. 13/4 or 3 1/4

Answer:

1-11 7/15

i think thats simplest form

2-3 1/4

3-13/30

im not sure if i did this right think this is right

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