Solve using substitution. The solution is 4x-2y=-20 y=-3x

Answers

Answer 1

Answer:

X=-2

Step-by-step explanation:

4x-2(-3x)= -20

4x+6x=-20

10x=-20

/10    /10

x=-2

Hope this helps!

Answer 2
4x - 2y = -20
4x - 2(-3x) = -20
4x - -6x = -20
4x + 6x = -20
10x = -20
-20 divided by 10
x = -2

Related Questions

helppppppppppppppppp

Answers

Domain: (-infinity, +infinity)
Range: [4,-infinity)
Vertex: (0,4)
Zeros: (0,2) and (0,-2)
Axis of symmetry: y=0
Y intercept: (0,4)

II. Work out questions
6. A survey was conducted by
asking 120 students in a town
how they traveled to school.
The following pie chart shows
the result of the survey.
What are the number of students
that travel to school by bus?



Best Answer gonna have branliest

Answers

Answer:

(a) Since, the highest central angle 120⁰ is of the bus

hence , the most common mode of transport is the bus.

(b) Fraction of children travelling by car =

angle covered by car section

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

total angle

= 90⁰ 1

--------- = ---------

360⁰ 4

(c) No. of children travelling by car = Fraction of children travelling by car× Total no of children.

1

= 18 = ----- × Total no. of children.......from(b)

4

⇒ Total no of children = 18×4

⇒ Total no of children = 72

(d) Central angle of children who do not take texi = 120⁰ +90⁰ +60⁰+60⁰

⇒ Central angle of students who do not take taxi = 330⁰

⇒ Central angle of students who do take taxi = 360⁰ −330⁰ =30⁰

30⁰

No . of children travelling by taxi = --------- × Total no of children

360⁰

30⁰

⇒ No of children travelling by taxi = --------- × 72 = 6

360⁰

(e) The central angle for students travelling by cycle and those who walk is same.

Thus , the two modes of transport are equal number of children travelling are cycle and walk.

Step-by-step explanation:

hope it's helpful to you

have a great day ahead buddy✌️✌️☺️☺️

I need help on this ​

Answers

Step-by-step explanation:

it is 0.7777777778 . make sure you round it though 0.7^. or 0.78

Answer:

7/9

Step-by-step explanation:

1) Put 1 over 7, like this: 7/1

   REMEMBER EVERYTIME THERE IS A WHOLE NUMBER! PUT A 1 OVER IT!

2) You would get your equation as this: 7/1 * 1/9

3) Multiply HORIZONATLY!

 7 * 1 / 1 * 9  =  7/9

4) Your answer is 7/9!

What is the GCF of 20, 10 and 30?

Answers

Answer:

10 is the GCF

Step-by-step explanation:

Answer:

10

Step-by-step explanation:

This is an isosceles right triangle.
The hypotenuse has a length of 1.
Find the length of each leg.

Answers

Answer:

Step-by-step explanation:

if we have a right triangle, and isosceles

c^2=a^2+b^2 , in this case of isosceles, a=b

c^2=2a^2

1^2=[tex]\sqrt{2a^2}[/tex]

1=a[tex]\sqrt{2}[/tex]

a=1/[tex]\sqrt{2}[/tex]=[tex]\sqrt{2}[/tex]/2

write an algebraic expression for the verbal expression
x more than 7

Answers

Answer:

x+7

Step-by-step explanation:

idek kinda thought that was obvious but who know I could be wrong

The algebraic expression for the verbal expression x more than 7 will be x + 7.

What is Algebra?

The analysis of mathematical representations is algebra, and the handling of those symbols is logic.

PEMDAS rule means for the Parenthesis, Exponent, Multiplication, Division, Addition, and Subtraction. This rule is used to solve the equation in a proper and correct manner.

The algebraic expression for the verbal expression x more than 7 will be

The numbers will be x  and 7. And the sum of the numbers x and 7 will be given as,

⇒ x + 7

The algebraic expression for the verbal expression x more than 7 will be x + 7.

More about the Algebra link is given below.

https://brainly.com/question/953809

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6. Tim and Jude share some
money in the ratio 3:4. If Tim gets
$450. How much did they share?​

Answers

Answer:

They shared $1050.

Step-by-step explanation:

Divide 450/3 = 150

150 * 4 = 600

If Tim gets $450, then Jude will get $600.

450 + 600 = 1050

If Tim gets $400, then Jude will get $600.

Find the area of a rectangle with a base of 15 feet and a height of 20 feet.

Answers

Answer:

1/2 times base times height. So you would do 1/2 x 15 x 20 equals....

Step-by-step explanation:

base * height
(15)(20)
= 300

What is the missing length?

Answers

64 = 8x

64 = 8×8

answer is 8 km

Please Help!!!

What two numbers go there?

Answers

The answer is 9/7!! Hope it helps

11111111111111111111111

Answers

Answer:

1) Zero based on (-16·t - 2) is t = -1/8 second

2) Zero based on (t - 1) is t = 1 second

Step-by-step explanation:

The given functions representing the height of the beach ball the child throws as a function of time are;

y = (-16·t - 2)·(t - 1) and y = -16·t² + 14·t + 2

We note that (-16·t - 2)·(t - 1) = -16·t² + 14·t + 2

Therefore, the function representing the height of the beachball, 'y', is y = (-16·t - 2)·(t - 1) = -16·t² + 14·t + 2

The zeros of a function are the values of the variables, 'x', of the function that makes the value of the function, f(x), equal to zero

In the function of the question, we have;

y = (-16·t - 2)·(t - 1) = -16·t² + 14·t + 2

The above equation can be written as follows;

y = (-16·t - 2) × (t - 1)

Therefore, 'y' equals zero when either (-16·t - 2) = 0 or (t - 1) = 0

1) The zero based on (-16·t - 2) = 0, is given as follows;

(-16·t - 2) = 0

∴ t = 2/(-16) = -1/8

t = -1/8 second

The zero based on (-16·t - 2) is t = -1/8 second

2) The zero based on (t - 1) = 0, is given as follows;

(t - 1) = 0

∴ t = 1 second

The zero based on (t - 1) is t = 1 second

help quickly, please! I'll mark you brainliest if you're right!

Answers

Answer:

C 803.8 in2

Step-by-step explanation:

Answer:

the answer is C 803.8 in2

Step-by-step explanation:


3x+y=-9
Y=5x+7
Solve the system of linear equations by substitution

Answers

Answer:

x=-2

Step-by-step explanation:

Substitute y=5x+7 into the equation 3x+y=-9

So you will have, 3x+5x+7=-9

3x+5x=8x

8x+7=-9

8x+7-7=-9-7

8x=-16

x=-2

Jason bought 4.5 kilograms of cream cheese. How many grams of cream cheese did Jason buy?

Answers

Answer:

the answer is 4500

Step-by-step explanation:

Answer:

He Bought 4,500 Grams of Cream Cheese.

Step-by-step explanation:

What is the measure

Answers

9514 1404 393

Answer:

  ∠SAP = 85°

Step-by-step explanation:

The whole is the sum of the parts.

  ∠SAX = ∠SAP + ∠PAX

  142° = ∠SAP + 57° . . . . . . . use the given values in the equation

  ∠SAP = 142° -57° . . . . . . . . subtract 57° from both sides

  ∠SAP = 85°

Solve these simultaneous equations: 3x = y and x = y - 16

Answers

Answer:

x=8

y=24

Step-by-step explanation:

3x=y

x=y-16

Substitute y for 3x

x=3x-16

Add 16 to each side

x+16=3x

Subtract x

16=2x

Divide each side by 2

8=x

y=3x=3×8=24

y=24

Answer :Value of x is 8Value of y is 24Explaination :

Here we have been given with two equations and we have to calculate the values of x and y. So we would be using substitution method for it.

3x = y (Equation No 1)x = y - 16 (Equation No 2)

Here we can clearly see that value of y is 3x. So we would substitute it in Equation No 2.

>> x = y - 16

>> x = 3x - 16

>> x - 3x = -16

>> -2x = -16

>> 2x = 16

>> x = 16 / 2

>> x = 8

Finding out value of y:-

>> y = 3x

>> y = 3 (8)

>> y = 3 × 8

>> y = 24 [tex] \: [/tex]

HELP DUE IN 10 MINS! Finish the similarity statement.

∆DEC ~ ∆??

Answers

Answer:

pog

Step-by-step explanation:

that test :P

Jesse has a ribbon that is 12 4.6 yards long. He wants to cut it into pieces that are 1.4 yards long. How many 1.4 yard pieces will he get from the ribbon? will mark brainliest if you mark one here you will be reported just to get the points​

Answers

124.6 yards total, and how many 1.4 yard pieces will he get?

124.6/1.4 = 89 pieces.

Hope this helped.

Answer:

89 pieces

Step-by-step explanation:

124.6/ 1.4 = 89 pieces

what is the difference (7² + 8² + 9²) - (6² + 5² + 4²)

Answers

Answer:

199

Step-by-step explanation:

49 + 64 + 81 - 36 +25+16

194 - 36 +25 + 16

-36 + 25 + 16

= -11 + 16 = 5

194 + 5 = 199

A local hamburger shop sold a combined total of 450 hamburgers and cheeseburgers on Thursday. There were 50 fewer cheeseburgers sold than hamburgers. How many hamburgers were sold on Thursday?​

Answers

Answer:

250 hamburgers

Step-by-step explanation:

so if there were 50 less cheeseburgers then I would take 50 away from 450 and I would get 400. And then I divided it by 2. And so 200+50 = 250 so 250 hamburgers and 200 cheeseburgers. I hope this helps and I'm not good at explaining. :)

What must NOT be included in an expression?

1. an equals sign

2. at least one variable

3. one or more numbers

4. an operation such as addition

Answers

Answer:

1. an equal sign

Step-by-step explanation:

An expression is a mathematical statement that does not contain an equal sign. It cannot be solved for unless the value of the variable is given.

Answer:

1. an equals sign

Step-by-step explanation:

expression does NOT have a equal sign but an equation does have an equal sign.

What is the end behavior of the graph of the polynomial function f(x) = 3x6 + 30x5 + 75x4?

Answers

Answer:

rises to the left and rises to the right

Step-by-step explanation:

The end behavior of the graph of f(x) = 3x⁶ + 30x⁵ + 75x⁴ is that it as x → -∞, y → ∞ and as x → -∞, y→ ∞.

What is a polynomial?

A polynomial is defined as a mathematical expression that has a minimum of two terms containing variables or numbers. A polynomial can have more than one term.

The degree of the polynomial function is 6, which is even, and the leading coefficient is positive, so the end behavior of the graph is as follows:

As x approaches negative infinity, both the x⁶ and x⁵ terms become very large positive numbers, and so the value of the function f(x) approaches positive infinity.

As x approaches positive infinity, both the x⁶ and x⁵ terms become very large positive numbers, and so the value of the function f(x) also approaches positive infinity.

Therefore, the end behavior of the graph of f(x) is that it as x → -∞, y → ∞ and as x → -∞, y→ ∞.

Learn more about the polynomial here:

brainly.com/question/11536910

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Classify the quadrilateral below.

Answers

Answer:

rhombus

Step-by-step explanation:

Match the letter to the correct action taking place.

Answers

Answer:

Box 1 is A (top box)

Box 2 is B (middle box)

Box 3 is C (lowest box)

I am not taking computer science, so I am just using visual clues... If this is not worth a lot in your grade, making mistakes is okay. So, you can guess.

Simplify cot θ sec θ.

Answers

Answer:

csc θ

Step-by-step explanation:

cot θ sec θ can be substituted by reducing the expression into equivalent parts.

cot θ = (cos θ)/(sin θ)

sec θ = 1/(cos θ)

Reduce these two values to get 1/(sin θ)

This expression can then be changed to csc θ, as it is also equivalent.

The trigonometric expression cot θ × sec θ in the simplified form will be cosec θ.

What is trigonometry?

Trigonometric functions examine the interaction between the dimensions and angles of a triangular form.

The definition of simplicity is making something simpler to achieve or grasp while also making it a little less difficult.

The expression is given below.

⇒ cot θ × sec θ

We know that cot θ = cos θ / sin θ and sec θ = 1 / cos θ, then we have

⇒ cot θ × sec θ

⇒ cos θ / sin θ × 1 / cos θ

⇒ 1 / sin θ

We know that 1 / sin θ = cos θ

⇒ 1 / sin θ

⇒ cosec θ

The trigonometric expression cot θ × sec θ in the simplified form will be cosec θ.

More about the trigonometry link is given below.

https://brainly.com/question/22698523

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Pls help ASAP!!!!!!!!
Pls help
I will cash app if I get it right

Answers

Answer:

39 degrees

Step-by-step explanation:

97+44= 141

141 - 180 = 39

39 degrees, no need to cash app LOL

the sun of 20 pesos bills (t) and fifty pesos bills (f) is greater than pho 42D​

Answers

Answer

it is 0.5

Step-by-step explanation:

Yoshi multiplied -6.2 by -0.14. His result was -0.868. Which statement likely describes the error he made in his calculation?

Yoshi did not apply the order of operations.
Yoshi applied the rules of signed numbers incorrectly.
Yoshi placed the decimal point in his answer in the wrong place.
Yoshi estimated, but he did not find the actual answer.

Answers

Answer:

Yoshi applied the rules of signed numbers incorrectly

Step-by-step explanation:

When you multiply 2 negatives, you get a positive.

What is the length of a diagonal of rectangle EFGH?

Answers

Answer:

Step-by-step explanation:

So it is 3 by 7 rectangle and diagonal

FE=3 EH=7 so FH=6

PLEASE HELP!!Mathematically, when you square root a number, you
will get 2 solutions.
Sometimes True
Always True
Or Never True
Explain your thinking.

Answers

im pretty sure its sometimes because not every square root has two solutions but a square root for x2 =49 has two solutions
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