Mathematics High School

Find the value of x in x + y = 9 and x - y = 3.

Answers

Answer 1

Answer:

x=6

Step-by-step explanation:

x + y = 9

x - y = 3.

We can use elimination to find the value of x

Add the two equations together

x + y = 9

x - y = 3

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

2x+0y = 12

2x = 12

Divide by 2

2x/2 = 12/2

x = 6

Answer 2

Answer:

x=6

Step-by-step explanation:

6+3=9

6-3=3. algebra

Related Questions

Twice a number divided by five

Answers

Twice a number divided by 5 is expressed known as 2x/5. Equations are expressions separated by an equal sign.

8x – 2 – 5x + 7 = one solution

Answers

━━━━━━━☆☆━━━━━━━

▹ Answer

3x + 5

▹ Step-by-Step Explanation

8x - 2 - 5x + 7

= 3x - 2 + 7

= 3x + 5

Hope this helps!

- CloutAnswers ❁

Brainliest is greatly appreciated!

━━━━━━━☆☆━━━━━━━

Answer: For the equation to have one solution, use any number that does not contain 3x.

Step-by-step explanation:

8x - 2 - 5x + 7

Combine like terms

3x + 5

Laila ran 4/5 miles in 1/10 hour. What is her rate in miles per hour

Answers

1/2 mile per hour hope this helped

Answer:

Her speed is 4/5miles per 1/10hour

which is 0.8miles per 6 minutes

so we times 10 which is

80miles per 1 hour

Step-by-step explanation:

In the same flyer, squid rings are priced at $8.99 for 550 g. What is the unit price per kg?(answer with the entire unit rate - $0.000 / kg rounded to the nearest thousandth leaving spaces as indicated in the example here.)

Answers

9514 1404 393

Answer:

$16.345 / kg

Step-by-step explanation:

You know there are 1000 grams in 1 kilogram. (The prefix kilo- means 1000.) So 550 grams is 550/1000 kg = 0.55 kg.

The price per kilogram is found by dividing the price by the corresponding number of kilograms:

unit price = $8.99 / (0.55 kg) = $16.3454545... (2-digit repeat) / kg

Rounded to 3 decimal digits, the unit rate is ...

unit rate = $16.345 / kg

2. Suppose that four times the square of a number equals 20 times that num-
ber. What is the number?
3. Twice the square of the sum of a number and 3 is 98. Find the number. help me in number 2 and 3 please

Answers

Answer:

2. the answer is 5 because the square of 5 is 25 and 4 x 25 = 100 which is 20 x 5

Step-by-step explanation:

We are required to find the unknown number from the expression

let

the number = x

four times the square of a number equals 20 times that number

4x² = 20x

Divide both sides by 4x

x = 5

The number is 5

let

x = the unknown number

Twice the square of the sum of a number and 3 is 98

sum of a number and 3 = x + 3

square of the sum = (x+3)²

Twice the square = 2(x + 3)²

2(x + 3)² = 98

2(x² + 6x + 9) = 98

2x² + 12x + 18 = 98

2x² + 12x +18 - 98 = 0

2x² + 12x - 80 = 0

x² + 6x - 40 = 0

using factorization method to solve the quadratic equation

x² + 10x - 4x - 40 = 0

x(x + 10) - 4(x + 10) = 0

(x + 10) ( x - 4) = 0

x + 10 = 0 or x - 4 = 0

x = -10 or x = 4

Therefore, the unknown number is -10 or 4

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evaluate 2ps for p=3 and s=5
A)30
B)23
C)6
D)10

Answers

Answer: the real answer for this will be p=3/2 and s=5

Step-by-step explanation: here

2p=3

2p/2=3b/2 divide both sides by 2

P=3/2

3/2 for p in s=5

S=5

Answer P=3/2 and s= 5

Got it

Hey there!

“Evaluate 2ps for p=3 and s=5”

• Side note: If p = 3 then SUBSTITUTE where “p” is at in the equation; if s = 5 then SUBSTITUTE where “s” is at in the equation!

• New equation: 2(3)(5)

2(3)(5)

2(3) = 6

6(5) = 30

Answer: A. 30 ☑️

Good luck on your assignment and enjoy your day!

~LoveYourselfFirst:)

report the following sentence He said to me,"He is a nice fellow." i said to him,"You look sad and tired." she said to me ,"You are a clever person."
she said to them ,"You can pass your exams if you work hard."
sabnam said,"I went to the hospital yesterday."
Arbind said,"I lost my keys in the train yesterday.,:
shilpa said,"I was extremely nervous last week."
Husaain said,"We went to bed early last night."
Rahul said ,"I didn't take a taxi home last night."

Answers

Answer:

He told me that he was a nice fellow

I told him that he looked sad and tired

She told me that I was a clever person

She told them that they could pass their exams if they worked hard

Sabnam said that she had gone to the hospital the previous day

Shilpa said that she had been extremely nervous the previous week

Husaain said that they had gone to bed early the previous night

Rahul said that he had not taken a taxi home the previous night

Find the area enclosed by the curves x = -2, x = 3, y = 3x² - 28, and y = 4x + 11

Answers

the area enclosed by the curves x = -2, x = 3, y = 3x² - 28, and y = 4x + 11 is -1014/27 square units.

To find the area enclosed by the curves x = -2, x = 3, y = 3x² - 28, and y = 4x + 11, we can integrate the difference between the upper and lower curves with respect to x.

First, let's find the points of intersection between the curves to determine the limits of integration.

Setting the two y-equations equal to each other:

3x² - 28 = 4x + 11

Rearranging the equation:

3x² - 4x - 39 = 0

We can solve this quadratic equation to find the x-values of the points of intersection. Factoring or using the quadratic formula, we find:

(x - 3)(3x + 13) = 0

This gives two solutions: x = 3 and x = -13/3.

Therefore, the limits of integration for the x-coordinate are -13/3 to 3.

To calculate the area, we integrate the difference between the upper curve (3x² - 28) and the lower curve (4x + 11) with respect to x:

A = ∫[-13/3, 3] [(3x² - 28) - (4x + 11)] dx

Simplifying:

A = ∫[-13/3, 3] (3x² - 4x - 39) dx

Integrating term by term:

A = [(x³ - 2x² - 39x)]|_[-13/3 to 3]

Evaluating the definite integral:

A = [(3³ - 2(3)² - 39(3)) - ((-13/3)³ - 2(-13/3)² - 39(-13/3))]

A = [(27 - 18 - 117) - ((-2197/27) - 2(169/9) + 507/3)]

A = [-108 - (-2197/27 + 338/9 + 507/3)]

A = [-108 - (-1902/27)]

A = [-108 + 1902/27]

A = (1902/27) - (2916/27)

A = -1014/27

Therefore, the area enclosed by the curves x = -2, x = 3, y = 3x² - 28, and y = 4x + 11 is -1014/27 square units.

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Find the slope and the y-intercept of the line 6x - 3y = -2

Answers

Answer:

Heres ur answer!!

Step-by-step explanation:

Lmk if its correct

Find the slope and the y-intercept of the line 6x - 3y = -2

(Determine the net change between the indicated points on the graph.

Answers

Answer: 4

Step-by-step explanation:

The points are (-1, 1) and (5, 5).

So, the difference in the y coordinates is $5-1=4$.

The net change between the x-coordinates and y-coordinates on the graph is 6 units and 4 units respectively.

The coordinates from the given graph are (5, 5) and (-1, 1).

What is the net change between the coordinate points?

Given two points, (a, f(a)) and (b, f(b)) on the graph of f(x), the net change is the difference between the two f(x) values. Thus, net change is given by f(b)−f(a).

Here, the change in x-coordinates is 5-(-1) = 6

The change in y-coordinates is 5-1 = 4

Therefore, the net change between the x-coordinates and y-coordinates on the graph is 6 units and 4 units respectively.

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at the annual dog show, chantel noticed that there were three more scotties than schnauzers. she also realized that the number of wirehaired terriers was five less than twice the number of schnauzers. if there were dogs in all (counting schnauzers, scotties, and wirehaired terriers), how many schnauzers were there? write and solve an equation.

Answers

The no. of schnauzers in the annual dog show are 20.

Assume that there are x Schnauzers at the annual dog show.

Scotties entered in the yearly dog show: x + 3

There are 2x - 5 Wirehaired Terriers entered in the annual dog show.

There are 78 dogs in all competing in the yearly dog show.

Consequently, the equation becomes

x + x + 3 + 2x - 5 = 78.

4x - 2 = 78

4x = 78 + 2

4x = 80

x = 80/4

= 20

In the yearly dog show, there are 20 Schnauzers. I hope you can understand the process without too much trouble. It is crucial to thoroughly study the equation so that you can easily solve the issue.

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Complete a table of values.

y = 2/5 * -4

Answers

Based on the given formula of y = 2/5x - 4, a table of values would look like:
x 0 1 2 3 4

y -4 -3.6 -3.2 -2.8 -2.4

How to construct a table of values?

The given function is y = 2/5x - 4. To come up with a table of values, first come up with some x values like from 0 to 5.

Then slot these values of x into the function to find the value of y.

x = 0:
= 2/5(0) - 4

= -4

x = 1

= 2/5 (1) - 4

= - 3.6

x = 2

= 2/5(2) - 4

= -3.2

x = 3

= 2/5(3) - 4

= -2.8

x = 4

= 2/5 (4) - 4

= -2.4

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Use the formula to find the volume of the figure. Show your work.

Answers

Hello !

Answer:

$\boxed{\sf V{cone} \approx 2408.55 m^3}$

Step-by-step explanation:

To find the volume of a cone with the radius of its base and its height, we will apply the following formula:

$ \sf V{cone} = \dfrac{\pi \times r^2 \times h}{3} $

Where r is the radius of its base and h is its height.

Given:

r = 10 mh = 23 m

Let's substitute our values into the formula:

$\sf V{cone} = \dfrac{\pi (10)^2(23)}{3} = \dfrac{2300\pi}{3} \ \ \\\boxed{\sf V{cone} \approx 2408.55 m^3}$

Have a nice day ;)

\ all shoe 25 PERCENTAGE says the sign. what will be the sale
price of pair of dress shoes originally at $69.98 type o-*

Answers

The sale price of a pair of dress shoes originally at $69.98 with a 25% discount will be $52.49.

To find the sale price, you need to calculate the discount amount and subtract it from the original price.

Step 1: Find the discount amount by multiplying the original price by the discount percentage.
$69.98 x 0.25 = $17.49

Step 2: Subtract the discount amount from the original price to get the sale price.
$69.98 - $17.49 = $52.49

Therefore, the sale price of the dress shoes will be $52.49.

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8th grade
A dance teacher offers two options for lessons.
Option 1: $30 joining fee and $15 per lesson
Option 2: $0 joining fee and $20 per lesson
After how many classes will both options have the same cost ?

Answers

2 classes. Explanation:

2 classes that is the answer

Based on the information given, compute yearly total dividends as well as dividends per share paid to common and preferred stockholders. There are 5,000 shares of $50 par value preferred stock outstanding, and 25,000 shares of common stock outstanding. Preferred stock has an 8 percent guaranteed rate of return. Dividends are declared of $1. 25 per share of common stock, together with the guaranteed rate for preferred stock. Common Stock: $
Preferred Stock: $

Answers

1. Yearly total dividends paid are $151,250.

2. The dividends per share are $1.25 for common stockholders

3. The dividends per share are $4 for preferred stockholders.

What are yearly total dividends and dividends per share?

We must calculate amount of dividends paid to the preferred stockholders in order to get dividends per share for common and preferred stockholders.

The per dividends paid to the preferred stockholders is:

= $50 par value x 8% guaranteed rate of return

= $4 per share

The total dividends paid to preferred stockholders:

= $4 per share x 5,000 shares

= $20,000

The per dividends paid to those stockholder is calculated as:

= Common stock + Preferred stock

= $1.25 per share + $4 per share

= $5.25 per share

The total dividends paid to common stockholders:

= $5.25 per share x 25,000 shares

= $131,250.

Answers

Answer:

The correct answer should be 4

Which statement is false:

A. A ratio is a comparison of two quantities that uses
division.

B. A rate compares two quantities that have different
units of measure.

C. Equivalent ratios are ratios that name a different,
unequal ratio.

D. When the comparison is to one unit, the rate is
called a unit

Please help!!

Answers

9514 1404 393

Answer:

C. Equivalent ratios are ratios that name a different, unequal ratio.

Step-by-step explanation:

Statement C simply makes no sense. It cannot be considered to be true.

Statement D seems to be missing a word: ... the rate is called a unit rate.

The midpoint of GH is M(-5, 4). One endpoint is H (-8, 0).
Find the coordinates of end point G

Answers

Answer:

G (-2,8)

Step-by-step explanation:

(-8+x)/2 = -5

-8 + x = -10

x = -10 + 8

x = -2

(0+y)/2 = 4

y = 4 · 2

y = 8

Please help!

You flip a coin twice.

What is the probability of getting tails and then getting heads?

Write your answer as a percentage.

___%

Answers

Answer: 25%

Step-by-step explanation:

You have a 1/2 chance of landing a heads or tails both times. So, you multiply 1/2 *1/2 = 1/4. 1/4 = 0.25 = 25%.

ray's car averages $40$ miles per gallon of gasoline, and tom's car averages $10$ miles per gallon of gasoline. ray and tom each drive the same number of miles. what is the cars' combined rate of miles per gallon of gasoline?

Answers

Therefore , the average rate of combined miles per gallon of gasoline is $25 MPG.

What is average?

The core value of a set of data is expressed mathematically as the average of a list of data. It is defined mathematically as the ratio between the total number of units in the list and the sum of all the data. The term "mean" in statistics also refers to the average of a particular set of numerical data. For instance, (2+3+4)/3 = 9/3 = 3 is the average of 2, 3, and 4. As a result, in this instance, 3, which also includes 2, 3, and 4, serves as the core value.

Here,

They both traveled the same distance as a result. 80 miles will do for now.

Ray used two gallons of fuel,

Tom used eight,

for a combined total of 160 miles and ten gallons of fuel,

which seems like sixteen miles per gallon to me.

=> 40 + 10 /2

=> 50/2

=> 25

It's the average, or $25 MPG.

Therefore , the average rate of combined miles per gallon of gasoline is $25 MPG.

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Please help me

What’s the slope of this graph??

Answers

The slope of the line passing through the points (0, 30) and (8, 18) is -1.5.

Given is a graph of a line passing through the points (0, 30) and (8, 18).

To find the slope of the line passing through two points, you can use the formula:

slope = (y2 - y1) / (x2 - x1)

Let's use the points (0, 30) and (8, 18) to calculate the slope:

x1 = 0

y1 = 30

x2 = 8

y2 = 18

slope = (18 - 30) / (8 - 0)

= -12 / 8

= -1.5

Therefore, the slope of the line passing through the points (0, 30) and (8, 18) is -1.5.

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Find the difference (4 - 7m) - (-n + 2m - 1)

Answers

Im pretty sure that the answer to that is 5-9m+n

Vikas is the head of student council this year at his high school in London. He is responsible for planning the annual graduation trip to Canada’s Wonderland. The students will spend one full day at the park and return late that evening. The school has rented a bus for transportation. The entry fee into the park is $50 and the bus costs $600. Write an equation to relate the cost, C, in dollars to the number of student, s, who participate in this fun trip.

Answers

Answer:

C = 600 + 50s

Step-by-step explanation:

The students are planning to visits the Canada's wonderland. The students will spend a full day at the park.

The entry fee for each student is $50 and the bus cost is $600. Each student will pay $50 for entry into the park.

Let

the number of student = s

cost of the trip = C

Relating the variable C and s

The total amount of money the student will pay for entry fee = 50 × s = 50s

Therefore, cost of the trip can be expressed as follows

C = 600 + 50s

Okay if you can’t see it please zoom in and the answers go down the alphabet to the left so please help me check over all of these and help me in the marked out ones and the bottom 3

Answers

Answer:

I can't go on Zoom when I'm doing a test. Sorry. Ohhhh you need help, wrong Zoom. Lol, sorry.

Step-by-step explanation: They are probably angles like right angle, obtuse, mostly acute.

(x^3+5x^2+10x+6) divided by (x+1) long division work and answer
PLEASE HURRYYYY;(((

Answers

Answer: 456 ÷ 65 = 209 ÷ 32 = 87 = 23

Step-by-step explanation:

Astronomers often measure large distances using astronomical units (AU) where 1 AU is the average distance from Earth to the Sun. In the image, d
represents the distance from a start to the Sun. Using a technique called "stellar parallax," astronomers determined θ
is 0.00001389 degrees.

b) Write an equation to calculate d
for any star.

(Your response must include an equal sign, and the variables d
and θ.)

Answers

The trigonometric function can be used to calculate the distance (4124966.128 AU) between the star and also the sun.

d = 4124966.128

Define the term "stellar parallax"?Astronomers can determine the apparent shift in location of a star by measuring its position once, then again six months later. Stellar parallax refers to the apparent motion of the star.

Given:

Astronomers frequently use astronomical units (AU), where 1 AU represents the typical distance between the Earth and the Sun.The graphic depicts the separation between the Sun and a star.Astronomers discovered that using a method known as "stellar parallax," is 0.00001389 degrees.The steps listed below can be used to calculate the astronomical unit distance between star and the Sun:

Step 1: To calculate the distance in astronomical units here between star and the Sun, apply the trigonometric function.

The sine function is used to calculate the distance in step two.

sin Ф = P/ H

where H is the hypotenuse and P is the perpendicular.

Step 3: Replace the above expression with the known terms.

sin (0.00001389 ) = 1/d

Step 4: Condense the previous expression.

d = 4124966.128

Thus, the distance of star from the sun is found as d = 4124966.128.

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worth 30 pts pls helppp

Answers

Answer:

Step-by-step explanation:

it is blank

1. The following sed command is supposed to redact all hyphen-delimited numbers on each line of the input stream; will it operate as expected?
s/[0-9]*-?//g
(a) Yes
(b) No

Answers

Yes, the given sed command will operate as expected to redact all hyphen-delimited numbers on each line of the input stream. Option a is Correct.

The regular expression `[0-9]*-?` matches any sequence of one or more digits followed by a hyphen and an optional hyphen, which is a hyphen followed by zero or more digits. The `//g` flag at the end of the command tells sed to apply the replacement globally, so that all matches on each line are replaced.

For example, if the input stream contains the line "123-456-7890", the sed command will replace the hyphen-delimited number with an empty string, resulting in the line "1234567890". Similarly, if the input stream contains the line "7890-1234-5678", the sed command will also replace the hyphen-delimited number with an empty string, resulting in the line "789012345678". Option a is Correct.

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how much does amber charge per cookie delivery

Answers

Amber charges 2.5 dollars per cookie delivery.

How to determine the charges per cookies delivery

From the question, we have the following parameters that can be used in our computation:

Number of deliveries = 4

Total charges = $10

Using the above as a guide, we have the following:

Unit rate = Total charges/Number of deliveries

So, we have

Unit rate = 10/4

Evaluate

Unit rate = 2.5

Hence. the unit rate is $2.5