Please help will mark Brainly

Please Help Will Mark Brainly

Answers

Answer 1

The solutions of the equation 3x - y = 1 are (-2,-7),(-1,-4) and (3,8) thus option (A),(B) and (D) are correct.

What is the equation?

There are many different ways to define an equation. The definition of an equation in algebra is a mathematical statement that demonstrates the equality of 2 mathematical expressions.

In another word, the equation must be constrained with some constraints.

As per the given equation,

3x - y = 1

Substitute, x = -2

3(-2) - y = 1

y = -7 thus  (-2,-7) satisfied.

Similarly (-1,-4) and (3,8) are also satisfied.

Hence "The solutions of the equation 3x - y = 1 are (-2,-7),(-1,-4) and (3,8)".

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Related Questions

what’s the solution for 7x - 10x + 2x = -5

Answers

Answer:

x = 5

Step-by-step explanation:

Finding the solution is getting the value for x that makes the math sentence true.

7x -10x +2x = -5

Combine like terms (all the x terms can add together)

-x = -5

Multiply (or divide) both sides by -1

x = 5

Express 602.16 dam in decimeters

Answers

The expression of 602.16 dam in decimeters can be written as 60216 decimeter.

How can the  expression of 602.16 dam  be converted to decimeters?

The concept that will be used in the calculation is conversion. to perform this conversion, it is important to note that 1 Decimeter (dm) is equal to 0.01 dekameter (dam).

Then, if 1dm = 0.01 dam

               Xdm     = 602.16 dam

Where x is the value in decimeter.

Then we can cross multiply as :

X= (602.16 dam * 1dm)/ 0.01 dam

= 60216 decimeter.

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Help pls and thx 20 points

Answers

a) 7y and (2y²-9) are the length and width expressions where one dimension is the GCF.

b) When y= 2, the area of the rectangle is -14

What is meant by area?

The area amount expresses the size of a region on a planar or curved surface.

A two-dimensional figure's area is the amount of space it occupies. It is the number of unit squares that cover the surface of a closed figure in other words. Square units, which are frequently expressed as square inches, square feet, and so on, are the standard unit of area.

A rectangle is a two-dimensional figure, and if one of the dimensions is the GCF, as indicated in the job, then:

7y and (2y²-9) are the length and width expressions where one dimension is the GCF.

Furthermore, when y= 2, the area of the rectangle is;

14(2³) - 63(2) = 112-126

= -14

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36/(x-3)=4 thank uu :>

Answers

Answer:

12

Step-by-step explanation:

36 / (x - 3) = 4

multiply both sides by (x - 3):

(x - 3)(36 / (x - 3)) = 4(x - 3)

36 = 4(x - 3)

expand right side:

36 = 4x - 12

add 12 to both sides:

36 + 12 = 4x - 12 + 12

48 = 4x

divide both sides by 4:

48/4 = 4x/4

x = 12

What is the following sum?
5(³3√x)+9(³√x)
0 14 (√x)
14 (2√x²)
0 14 (3√x)
0
X

Answers

The solution for the given expression is 14∛x. The correct option is (C).

What is an Algebraic expression?

An algebraic expression can be obtained by doing mathematical operations on the variable and constant terms.

The variable part of an algebraic expression can never be added or subtracted from the constant part.

The given expression is as below,

5∛x + 9∛x

The given expression can be simplified as follows,

5∛x + 9∛x

Here, both the terms have equivalent variables. So, both are like terms.

As per the rules like terms can be added or subtracted keeping the variable as the same.

Thus, 5∛x + 9∛x = 14∛x

Hence, the given expression can be evaluated as 5∛x + 9∛x = 14∛x.

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Please try to prove that the slope of the normal line of y=mx+bis -1/m

Answers

The slope of the normal line is proved to be -1/m using tangent

How to show that the slope of normal line is -1/m

Slope is similar to tangent and sometimes used interchangeably

assuming two lines of slope m and m', the angle between the two lines is x

tan x =  (m - m') / (1 + mm')

for a normal line x = 90

tan 90 =  (m - m') / (1 + mm')

tan 90 is ∞ = 1 / 0

1 / 0 =  (m - m') / (1 + mm')

cross multiplying

1 * (1 + mm') =  0 *  (m - m')

1 + mm' = 0

mm' = -1

m = -1/m'

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Juice A cost 0.10 more then per ounce than juice B. Ifa 12 ounce of juice A costs $564 what is the cost per ounce of juice B

Answers

bro I don’t know

1 ask your teacher

2 get sturdy

3

Which graph represents the function f(x) = |x − 1| − 3 ?

Answers

Answer:

See picture below.

Step-by-step explanation:

f(x) = |x|

This absolute value will have a v shape, the "v" point at (0,0)

Next,

f(x) = |x-1|

This (-1) moves the v shape one unit to the right, "a translation to the right by 1."

Finally,

f(x) = |x-1| - 3

This (-3) moves the v shape down 3 units. This is why the answer is the original

f(x) = |x|

except it's moved right by 1, and down by 3.

Step-by-step explanation:

The graph that represents is translated right by 1 units and 3 unit up to form. Hence, graph (a) is correct.

What is a function?

Function is a type of relation, or rule, that maps one input to specific single output.

The parent function of an absolute function is;

y = |x|

When a function is translated right by h units, the transformation rule by;

y = |x-h|

So:

|x-1|-3 means that it is translated right by 1 units

When a function is translated up k units, then the transformation rule is:

y = |x| + k

y = |x-1|-3

This means that it is translated right by 1 units and 3 unit up to form

Hence, graph (a) is correct

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asap pls

Simplify the expression and write the answer with
only positive exponent
(2p²)-³q4
(6q)-¹p-7​​

Answers

Answer:

8p^6q^4

6qp-7

Step-by-step explanation:

Mr. Evans is currently 4 times as old as his son, Dan. If Mr. Evans was 46 years old 2 years ago, how old is Dan now?

Answers

Answer:

the son age is 13band Evans age is 52 years old at present day

Dan is 12 years old.

What is Algebra?

A branch of mathematics known as algebra deals with symbols and the mathematical operations performed on them.

Variables are the name given to these symbols because they lack set values.

In order to determine the values, these symbols are also subjected to various addition, subtraction, multiplication, and division arithmetic operations.

Given:

let the Age of Dan is x years

Mr. Evans Age = 4x

If Mr. Evans was 46 years old 2 years ago

The, Present age of Mr. Evans = 48 years

So, Dan's Age = 48/4

                        = 12 years.

Hence, Dan is 12 years old.

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Jamal's friends toss 12 balls to him at the same time. Three balls are red, 3 are green, 3 are blue, and 3 are white. Jamal manages to catch 5 of the balls.

What is the probability that he catches 2 red balls and 1 ball of each of the other colors?

Enter your answer as percentage, expressed to the nearest tenth of a percent, like this: 42.2%

Answers

Answer:

Step-by-step explanation:

1 white 1 green 1 blue + 2 reds = 5 balls

5 seen as a percentage

5%

I NEED HELP ASAP WITH THIS

Answers

Answer: Jorge would have to run 3 [tex]\frac{3}{8}[/tex] miles to reach his 23 mile goal.

Step-by-step explanation:

When you add 5 [tex]\frac{3}{4}+ 7 \frac{3}{8}[/tex]=[tex]13\frac{1}{8}[/tex]

[tex]13\frac{1}{8}+6 \frac{1}{2}=19\frac{5}{8}[/tex]

Now you can subtract [tex]19 \frac{5}{8}[/tex] from 23, which would give you [tex]3\frac{3}{8}[/tex], being the total amount of miles left to run. You can add the terms without a calculator as well, by making the fractions have a common denominator.

Hope this helps!

The selling price of an item is a
function of the cost of
making the item. is it a function or not?

Answers

Yes, the selling price of an item is a function of the cost of making the item.

A function connects an input with an output. It is analogous to a machine with an input and an output. And the outcome is somehow connected to the input.

Cost is often the expenditure incurred for producing a product or service that a firm sells. The selling price is the amount paid by the buyer to purchase a product or products.

The selling price of an item is a function of the cost of creating the item since the manufacturer must sell at a price higher than the cost of making the item in order to recoup his investment and make a profit.

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5. If each month in Reno had the same
average rainfall as in August, what
would the total
amount of rainfall be
after 12 months?

Answers

Rainfall on August =x
Multiple 12 to x

Answer 12x

3x+2y=4 x=y+3
System of equations

Answers

Answer:

(2,-1)

Step-by-step explanation:

Given system of equations:

3x + 2y = 4x = y + 3

We are going to use the substitution method.

Step 1: Solve for x = y + 3 for x:
(Substitute y + 3 for x in 3x + 2y = 4)

3x+2y=4

3(y+3)+2y=4

5y + 9 = 4 ----> Simplify both sides of the equation

5y+9+−9=4+−9  -------> Add -9 to both sides

5y=−5

5y5 = -5/5  ------> Divide both sides by 5

y = −1

Step 1: Substitute -1 for y in x = y + 3:

x = y + 3

x = -1 + 3

x = 2 --------> (Simplify both sides of the equation)

Answer:

(2,-1)

(2,-1) hope this helps :\\\

Bilquis and her children went into a movie theater and she bought $60 worth of bags
of popcorn and pretzels. Each bag of popcorn costs $7.50 and each pretzel costs
$3.75. She bought 2 more bags of popcorn than pretzels. Graphically solve a system
of equations in order to determine the number of bags of popcorn, x, and the number
of pretzels, y, that Bilquis bought.

Answers

The number of bags of popcorn = 6

The number of pretzels  = 4

Let the number of bags of popcorn = x

the number of pretzels = y

From the question, we have

she bought $60 worth of bags of popcorn and pretzels.

Each bag of popcorn costs $7.50 and each pretzel costs $3.75.

7.50x+3.75y = 60................(i)

She bought 2 more bags of popcorn than pretzels.

x-y = 2................(ii)

Solving equation (i) and (ii), we get

x = 6

y = 4

The number of bags of popcorn = 6

The the number of pretzels  = 4

Addition:

The act of combining two or more items is known as addition. The process of computing the sum of two or more numbers in mathematics is called addition. It is a fundamental mathematical procedure that is frequently used in daily life. When we work with money, figure out our food bills, or figure out the time, we frequently employ addition. One-digit numbers can be added simply for solving addition problems, however for bigger numbers, we divide the numbers into columns using their corresponding place values, such as ones, tens, hundreds, thousands, and so on.

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I will give brainliest!

Answers

Answer:

1/2

Answer choice 3.

Step-by-step explanation:

Hello again.

We can write all the numbers out.

13,14,15,16,17,18,19,20,21,22,23,24

There are 12 values.

Half of the values are even, so the probability of an even number is 1/2.

PLEASE GIVE BRAINLIEST

Answer:

1/2

Step-by-step explanation:

Numbers between 13 and 24:

13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

Even numbers

13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24

number of Even numbers/total number of numbers = probability of even number

= 6/12

= 1/2

2x + 3y = 13
4x - y =-2

Answers

Answer:

x = 1/2

y = 4

Step-by-step explanation:

Given equations:

2x + 3y = 13 ----------------------(1)

4x - y = -2  ------------------------(2)

Multiply Eq. (1) by 2

2(2x + 3y) = 13 × 2

4x + 6y = 26 -------------------(3)

Subtract Eq. (3) from Eq. (2)

4x - y - 4x - 6y = -2 - 26

-y - 6y = -28

-7y = -28

7y = 28

Divide 7 to both sides

y = 4

Put y = 4 in Eq. (2)

4x - 4 = -2

Add 4 to both sides

4x = -2 + 4

4x = 2

Divide 4 to both sides

x = 2/4

x = 1/2

[tex]\rule[225]{225}{2}[/tex]

Start Root 144 End Root=
A. 11
B. 12
C. 13
D. 14
pre algebra
fast would appreciate it

Answers

Answer:

the answer is 12

explanation 12x12= 144

Which of the following statements is true? Choose the correct statement below. 1 O A. The equation x3 - x2 - x - 1 = 0 is equivalent to the equation x2(x - 1)-(x - 1) = 0. B. The equation 2x3 - x2 + 4x - 2 = 0 has solutions x = or x= +2 1. C. The equation x3 – x2 - x + 1 = 0 is equivalent to the equation (x2 - 1)(x - 1)(x + 1) = 0. OD. The equation x3 - x2 - x + 1 = 0 is equivalent to the equation x2(x - 1)-(x-1)=0. 2

Answers

Option D. The statement that is true from the equations that we have here is D. The equation x3 - x2 - x + 1 = 0 is equivalent to the equation x2(x - 1)-(x-1)=0.

How to solve the equation

I will have to start for the equation D, because at close glance we can easily see that the powers would be equal

The equation x3 - x2 - x + 1 = 0 is equivalent to the equation x2(x - 1)-(x-1)=0.

We are to simplify x²(x - 1)-(x-1)

we would have to open the brackets from the above

 x² * x +  x² * (-1) - x - (-1) = 0

It would be important to pay attention at the signs

such that we would have

x³ -  x² - x + 1 = 0

Therefore the equation  x^3 - x^2 - x + 1 = 0 is equivalent or equal to  x³ -  x² - x + 1 = 0 because they have the same solution

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Differentiate the function with respect to x. Shot steps

Answers

[tex]f'(x)=\frac{1}{\sqrt{1-(-4x^{2} + 3)^{4})^2} } 4.(-4x^2+3)^{3}[/tex] is differentiation of   [tex]f(x)=sin^{-1}(-4x^{2} + 3)^{4}[/tex]

What is Differential equation?

A differential equation is an equation that contains one or more functions with its derivatives.

The given function is [tex]f(x)=sin^{-1}(-4x^{2} + 3)^{4}[/tex]

By using chain rule we differentiated the function.

d/dx sin⁻¹x=1/√1-x²

[tex]f'(x)=\frac{1}{\sqrt{1-(-4x^{2} + 3)^{4})^2} } 4.(-4x^2+3)^{3}[/tex]

Hence,[tex]f'(x)=\frac{1}{\sqrt{1-(-4x^{2} + 3)^{4})^2} } 4.(-4x^2+3)^{3}[/tex] is differentiation of  [tex]f(x)=sin^{-1}(-4x^{2} + 3)^{4}[/tex]

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Rewrite sin(x+5pi/4) in terms of sin(x) and cos(x)

Answers

sin(x+5pi/4) sin(x+5pi/4) in terms of sin(x) and cos(x) can be rewritten as cos (x) . sin [tex](\frac{x + 5\pi }{4} )[/tex] .sin (x)

What is trigonometry

Trigonometry is a branch of mathematics that studies relationships between the sides and angles of triangles

Let find the common multiplier of sin

[tex](\frac{x + 5\pi }{4} )[/tex]sin (x), cos(x); cos (x) sin[tex](\frac{x + 5\pi }{4} )\\[/tex] sin (x)

Find the least common Multiplier of sin [tex](\frac{x + 5\pi }{4} )[/tex] sin (x) , cos (x)

Lowest common multiplier (LCM)

The LCM of a, b is the smallest multiplier that is divisible by both a and b

Factor sin [tex](\frac{x + 5\pi }{4 } )[/tex]sin ( x)

sin[tex]( \frac{x + 5\pi }{4} )[/tex]. sin(x)

Multiplier each factor with the highest power;

cos (x) .sin [tex](\frac{x + 5\pi }{4} )[/tex].sin (x)

Therefore, the trigonometry sin(x+5pi/4) in terms of sin(x) and cos(x) can be rewritten as cos (x) . sin [tex](\frac{x + 5\pi }{4} )[/tex] .sin (x)

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suppose h(t)=(3t+5)/t and k(t)=5/(t-3). Show that h(t) and k(t) are inverse functions using algebra.

Answers

We will see that the functions are inverses by proving that the composition is equal to the identity.

How to show that h(t) and k(t) are inverse functions?

Two functions are inverses if their composition is equal to the identity, this means that if h(t) and k(t) are inverses, then we can write:

h(k(t)) = t

and

k(h(t)) = t

Proving one of these will be enough.

Here the functions are:

h(t) = (3t + 5)/t

k(t) = 5/(t - 3)

Let's find h(k(t))

We will get:

h(k(t)) = (3*k(t) + 5)/k(t)

Now we can replace the function k(t) there.

h(k(t)) = (3*5/(t - 3) + 5)/(5/(t - 3))

Now we can simplify this using algebra.

h(k(t)) = ( 15/(t - 3) + 5)*(t - 3)/5

h(k(t)) = (15/(t - 3))*(t - 3)/5 + 5*(t - 3)/5

h(k(t)) = 3 + (t - 3) = t

h(k(t)) = t

So yes, the two functions are inverses.

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Three artists Richard, Allan and Shelby are painting the rooms of a building which
are numbered from 10 – 150. Richard has to work in all the rooms. Allan has to work in rooms
where the room number is a multiple of 3. Shelby has to work in rooms where the room number
is a multiple of 5. In which rooms will they all work together?

Answers

The rooms which the three artists Richard, Allan and Shelby will work together are room 15, 30, 45, 60, 75, 90, 105, 120, 135, 150 making a total of 10 rooms.

Which rooms will the three artist work together?

Richard works in all the roomsAllan works in rooms multiple of 3Shelby works in rooms multiple of 5

Find the multiples of 3 and 5

Multiples of 3 = 3,6,9,12,15,18,21,24,27,30,33,36,39,42,45,48,51,54,57,60,63,66,69,72,75,78,81,84,87,90,93,96,99, 102, 105, 108, 111, 114, 117, 120, 123, 126, 129, 132, 135, 138, 141, 144, 147, 150

Multiples of 5 = 5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100, 105, 110, 115, 120, 125, 130, 135, 140, 145, 150

The common multiples of 3 and 5 are; 15, 30, 45, 60, 75, 90, 105, 120, 135, 150

Each common multiple represent a room

= 10 rooms

Therefore, the rooms which the three artist will work together is 10 rooms

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PLS QUICK How did the mountainous geography of Athens influence the economy?


The people of Athens mined gold for trade.

The people of Athens were unable to raise any crops.

The people of Athens focused on the military to protect their region.

The people of Athens relied on sea trade.

Answers

Option D. The mountainous geography of Athens influence the economy as The people of Athens relied on sea trade.

How did the terrain of  Athens influence the economy ?

Greece's rugged terrain caused some areas, particularly Athens, to become dependent on trade. Many Greeks went on to become seafaring tradesmen and merchants. Greeks engaged in trade with other Mediterranean people for pottery, wine, and olive oil. They communicated with the outside world by sailing to neighboring islands.

The geography of the area influenced the ancient Greeks' political system and way of life. Mountains, seas, and islands formed natural barriers between the Greek city-states, forcing the Greeks to relocate to coastal areas.

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What is this question √5 + √5

Answers

The simplification form of the expression √5 + √5 is 2√5 after adding like terms.

What is an arithmetic operation?

It is defined as the operation in which we do the addition of numbers, subtraction, multiplication, and division. It has a basic four operators that is +, -, ×, and ÷.

It is given that:

The number expression is:

√5 + √5

After adding like terms:

2√5

The question is:

Solve the expression:

√5 + √5

Thus, the simplification form of the expression √5 + √5 is 2√5 after adding like terms.

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At a company 75% of the employees were men . After six women joined the company the ratio of men to women was2:1. Work out how many men work at the company

Answers

The number of men and women that work at the company are;

Number of men = 36

Number of women = 18

How to solve ratio word problems?

Let the total number of employees in the company be x.

Now, we are told that 75% of the employees were men. Thus;

Number of men = 75% * x = 0.75x

Number of women = 0.25x

Now, we are told that after 6 women joined, the ratio of men to women became 2: 1.

Thus;

New total employees = x + 6

New total number of women = 0.25x + 6

Thus;

0.75x/(0.25x + 6) = 2/1

Cross multiply to get;

0.75x = 2(0.25x + 6)

0.75x = 0.5x + 12

0.75x - 0.5x = 12

0.25x = 12

x = 12/0.25

x = 48

Number of women = 0.25(48) + 6 = 18

Number of men = (48 + 6) - 18 = 36

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Answer the questions ⬇️

Answers

Answer:

page 1=45 points

page 2

1=30

2=10

3=56

page 3

$1000

Step-by-step explanation:

1000 the math adds up

what is 490 * 5 .
A. 98

B.
485

C.
5,560

D.
6,860

Answers

Answer:

None of the answers are right based on given context.

The product is 2,450.

Step-by-step explanation:

1) use the partial product method.

4 9 0

×    5

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

4 5 0 (5×90)

2 0 0 0 (5×400)

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

2 4 5 0

2) Therefore 490 x 5 = 2,450.

2,450

none of the is right. this is a simple equation that can be put into a calculator which will give u the output of 2,450

Determine the distance between the points (−1, −4) and (−9, −8).

Answers

Answer:

The distance between these two points with coordinates (-1, -4) and (-9, -8) is 8.94 unites

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