Mathematics High School

The audio store normally sells a pair of speakers for $280. They are on sale this weekend for $224. What is the percent of decrease in price?

Answers

Answer 1

Answer: 20%

Explanation:

1. Turn it into a fraction (224/280)

2. Divide the numerator (224) by the denominator (280). (224÷280=0.8)

3. Subtract 1 by 0.8 (or 100% by 80%) that should give you the answer 0.2 (20%)

Checking work:

280x0.2=56

280-56=224

Related Questions

Find the value of x...

Answers

Answer:

10x+41=[5+-7]+[2x-2]

we move all terms to left 10x+41-[[5x-7+[2x-2]]=0

Step-by-step explanation:

l calculate terms in parentheses

5x+2x-7-2

we add all the numbers together, and 7x-9 back to the equation -7x-9]

we get ride of parentheses 10x-7+9+41=0 we add all the numbers together,and all 3x+50=0

we move all the terms containg x to the left, all other therms to the right 3x=50

x=-50\3

x-50\3

What is the slope of the line that passes throug the points (5,-1) and (-3,3)?

Answers

Answer:

negative slope.............

Answer:

Step-by-step explanation:

A copy machine can print 340 color copies every 8 minutes. Explain or show your reasoning.

A teacher printed 850 copies. How long did it take to print?

Answers

Step-by-step explanation:

340=8min

850=?(x)

340x=850×8

340x=6800

x=6800/340

x=20min

so..the teachertook 20 minute to print 850 copies

Simple:
340 copies every 8 minutes
Find copies per minute
340 / 8 = 42.5 copies/min
Now, to find out how long it took to print all 850 copies;
850 / 42.5 = 20 min.
It took 20 minutes.
Or
(850*8) / 340 = 20

Which expression means 9 less than twice n?

Answers

Answer:

9<2n

Step-by-step explanation:

The is answer 9<2n

fgyhujiugytdfyguhijokjohgyiuhojpugjuhiljhjvgijo;jlkbhijlhvjghiovjguhikvkhlkghohgvjyiogiig

What is sin 45°?
Lol I need help

Answers

Answer:

1/ √2

Step-by-step explanation:

Here, we want to get the value of sin 45

Mathematically the sine is the ratio of the opposite to the hypotenuse

The opposite here is 1 while the hypotenuse is

√2

so the value of sin 45 will be;

1/ √2

using the graphs below, identify which value of r, the correlation coefficient, best describes the graph

Answers

Answer:

You make no sense

Step-by-step explanation:

Answer:

THERE IS NOT A GRAPH

Step-by-step explanation:

What is the inverse function of f(x) = x/x-2

Answers

9514 1404 393

Answer:

f^-1(x) = 2x/(x -1)

Step-by-step explanation:

You can find the inverse function by solving for y:

[tex]f(y)=x\\\\\dfrac{y}{y-2}=x\\\\x(y-2)=y \qquad\text{multiply by $y-2$}\\\\xy-2x=y \qquad\text{eliminate parentheses}\\\\xy-y=2x \qquad\text{add $2x-y$}\\\\y(x-1)=2x \qquad\text{factor}\\\\y=\dfrac{2x}{x-1} \qquad\text{divide by the coefficient of $y$}\\\\\boxed{f^{-1}(x)=\dfrac{2x}{x-1}} \qquad\text{in functional form}[/tex]

Help me with this one pls

Answers

C. –1.3 + 1.9

[tex] = \tt{ - 1.3 - ( - 1.9)}[/tex][tex] = \green{\boxed{\tt{{ - 1.3 + 1.9}}}}[/tex][tex] = 0.6[/tex]

PLEASEEEE helpppppp !!!! Will mark Brianliest !!!!!!!!!!!!!!

Answers

Answer:

Step-by-step explanation:

answer B would give you an answer of 23.5... not 23 (bc 47/2 is not 23)

.
A bike race requires entrants to submit their best times before the race in order to qualify to participate. Bikers must be able to complete the 50-mile course in 2 hours or less.

Which of these times qualify for the race, assuming each biker rides at a constant rate? Choose the three correct answers.

1.Maria rode 75 miles in 2 hours and 45 minutes.

2.Travis rode 36 miles in 1 hour and 20 minutes.

3.Trish rode 63 miles in 3 hours.

4.Crystal rode 24 miles in 56 minutes.

5Carl rode 22 miles in 1 hour.

Answers

Answer:

1, 2, 5!

Step-by-step explanation:

1. Maria rode 75 miles in 2 hours and 45 minutes.

2. Travis rode 36 miles in 1 hour and 20 minutes.

5. Carl rode 22 miles in 1 hour.

hope this helps!!!!!!

plz mark brainliest!

Data were collected on the following variables. Which variable is LEAST likely to be approximated with a normal model?

A) The distribution of heights of tomato plants growing at an agricultural center, where most heights cluster around the center and there are some very short and very tall heights

B) The distribution of times that a certain brand of house paint lasts on a house, where the distribution is symmetric and bell-shaped

C) The distribution of lengths of the trout living in a certain stream, where the distribution is unimodal and clustered around the center, and the left half is a mirror image of the right half

D) The distribution of weights of mold samples growing in a laboratory, where the distribution is symmetric, unimodal, and does not have any outliers

E) The distribution of ages, in years, of all the residents of a town, where the right tail of the distribution is longer than the left

Answers

Answer:

E) The distribution of ages, in years, of all the residents of a town, where the right tail of the distribution is longer than the left

Step-by-step explanation:

Because the distribution is described as having a tail on the right that is longer than the left, it is skewed right and not a normal model.

The numbers of bags of crisps sold per day in a general shop was recorded over 13 days.

The results are shown below.
32 45 36 56 45 68 29 48 21 45 32 47 59

In order from smallest to biggest, the results are:
21 39 32 32 36 45 45 45 47 48 56 59 68

The formula for finding out the quartiles didn’t work when I tried it.

Answers

I just figured it out so I’ll answer it on this account lol.

Q1 = 32, Q2 = 45, Q3 = 52

Interquartile range = 52 - 32 = 20

Range = 68 - 21 = 47

Which expression is equivalent to this one?

Answers

Answer:

The answer is 1

Henry wants to see how many different colored crayons are in the crayon box.If there are 4 rows of 19 crayons,how many different colors are there?

Answers

Answer:

ons are in the crayon box.If there are 4 rows of 19 crayons,

Step-by-step explanation:

Which equation is a linear function?
y=2^x -1
y=x/2-5
y=2/x +3
y=x^2 +7

Answers

Answer:

Second Choice.

Step-by-step explanation:

[tex]y = mx + b[/tex]

That is the linear function. Any coefficients with higher degrees won't be considered as a linear function.

So we can cut out the first and last choice.

Then we have only two choices which are

[tex]y = \frac{x}{2} - 5 \\ y = \frac{2}{x} + 3[/tex]

The second equation is called Rational Function where a variable is a denominator.

Therefore, the correct answer is second choice.

Your family spends $30 for tickets to an aquarium and $3 per hour for parking. Write an equation that gives the total cost of your family's visit to the aquarium as a function of the number of hours that you are there. Find the total cost of 4 hours at the aquarium

Answers

Answer:

Equation: y=$3(x)+$30

Total cost $42

Step-by-step explanation:

Calculation to Find the total cost of 4 hours at the aquarium using this formula

y=mx+b

Where,

y intercept=Total cost

m=$3 per hour

b=$30 Tickets

x=4 hours

Let plug in the formula

First step is to form the equation

y=$3(x)+$30

Second step is to substitute 4 hours for m and b

y=$3(4)+$30

Hence:

y=$12+$30

How much are 6 twenty's

Answers

it’s $120.00 i hope this helped you

Answer:

120

Step-by-step explanation:

Help will mark brainlist.

1=
2=
3=
4=

Answers

1=45
2=45
3=45
4=45

4x45=180

Find out angle x.
(10points)

Answers

Answer:

X=166°

Step-by-step explanation:

It’s is X=166

I hope it helps!

Multiple Choice The perimeter of a square
is 68 m. If one side is represented by 3x + 2,
what is the value of x?
A 3
B 5
C 4
D 6
E 10

Answers

Answer:

The answer is B, 5.

Step-by-step explanation:

3x+2 is per side. A square has 4 sides. 3x+2 times 4 is 12x+8 (using the distributive property).

12x+8 = 68

12x = 60

divide both sides by 12...

60/12 = 5.

Therefore x =5

x/5-1=10

what is x in this equation?

Answers

Answer:

x = 55

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

x/5 - 1 = 10

Step 2: Solve for x

Add 1 to both sides: x/5 = 11Multiply 5 on both sides: x = 55

-Answer quickly- Simplify the following expression.

Answers

Answer:

Step-by-step explanation:

Answer:

Step-by-step explanation:

first add 1/7x and 2/9x by using the common denominator of 63

9/63x + 14/63x = 23/63x

and, 3/8 - 1/8 = 2/8 or 1/4

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