Solve the system of equations algebraically.

3x−6y=−15
−9x+12y=21

Answers

Answer 1

Answer:

(3x-9x)+12y-6y=21-15

-6x+6y=6.

I think that is the answer

Answer 2

Answer:

(3, 4)

Step-by-step explanation:

Solve the system by elimination.

Divide the second equation by 3 and add to fist equation:

3x - 6y - 9x/3 + 12y/3 = -15 + 21/33x - 3x - 6y + 4y = -15 + 7-2y = - 8y = -8/-2y = 4

Find the value of x:

3x - 6*4 = - 153x - 24 = - 153x = 24 - 153x = 9x = 3


Related Questions

Gauge Think! Think! Think! Direction: Choose the letter of the correct answer. Write your answer on a separate sheet of paper. 1. Which of the following decimal is greater than 0.721? A. 0.129 B. 0.192 C. 0.712 D. 0.921 2. Which of the following is correct? A. 0.69 > 0.69 B. 0.013 < 0.31 C. 0.005 = 0.05 D. 0.306 > 0.36 3. How does 6 in 0.2645 compared with 6 in 0.2465? A. 6 in 0.2645 is more B. 6 in 0.2465 is more C. 6 in 0.2645 is less D. They are equal 4. Which set of decimals show from least to greatest? A. 0.01,0.042, 0.087.0.06 B. 0.002, 0.03, 0.85, 0.13 C. 0.006, 0.023, 0.438, 0.9 D. 0.42, 0.1, 0.253, 0.341 5. Which set of decimals show from greatest to least? A. 0.51,0.072, 0.187, .0.06 B. 0.2, 0.103, 0.05, 0.03 C. 0.106, 0.053, 0.238, 0.9 D. 0.82, 0.11, 0.853, 0.041 PLEASE ANWER IT CORRECTLY PLEASE PLEASE PLEASE​

Answers

Answer:

1.  D

2. B

3. The six in the first one is in the tenths place, the second is in the thousandths. But the answer is A.

4. 5, 0.9, 0.85, 0.438, 0.42, 0.341, 0.253, 0.13, 0.1, 0.087, 0.042, 0.03, 0.023, 0.01, 0.006, 0.002, 0 Sorry, I did greatest to least on accident.

5. 0.9, 0.853, 0.82, 0.51, 0.238, 0.2, 0.187, 0.11, 0.106, 0.103, 0.072, 0.053, 0.05, 0.03 greatest to least.

Uhm, sorry if I ordered some wrong on accident.

87 is 12.5% of what number?

Answers

Answer:

696

Step-by-step explanation:

What is 2+2=?
PLS HEP ME
I in kindergarden.

Answers

Answer:

4

Step-by-step explanation:

You want a cookie?

Answer:

2+2 = 4

Step-by-step explanation:

1+1+1+1 = 4

Hope this helped!

mark me brainliest :D

A moving company charges $450 plus $12 per hour. Another moving company charges $21 per hour. How long is the job that costs the same no matter which moving company is used?

Answers

Answer:

50 hours

Step-by-step explanation:

Whats (c) ????????????? ????

Answers

Answer:

11

Step-by-step explanation:

yeah-ya............ right?

Check the picture below.

use the correct trig function to find the value of x. (SAH,CAH,TAH)​

Answers

Answer:

x=13.38

Step-by-step explanation:

Hi there!

We are given triangle ABC, with m<A=45°, CA=13, and BA=x

We want to find the value of x

First, let's find out which side is the adjacent, opposite, and hypotenuse

Using <A as the reference angle:

BC is the opposite

CA is the adjacent

BA is the hypotenuse

Recall the 3 most common trigonometric functions:

Sine is [tex]\frac{opposite}{hypotenuse}[/tex]

Cosine is [tex]\frac{adjacent}{hypotenuse}[/tex]

Tangent is [tex]\frac{opposite}{adjacent}[/tex]

Since we know the values of both the adjacent and the hypotenuse, let's use the cosine of <A

In reference to <A, the ratio will be:

cos(<A)=[tex]\frac{CA}{BA}[/tex]

Substituting all known values gives:

cos(45)=[tex]\frac{13}{x}[/tex]

Now multiply both sides by x

cos(45)x=13

Divide both sides by cos(45)

x=[tex]\frac{13}{cos(45)}[/tex]

Now plug [tex]\frac{13}{cos(45)}[/tex] into your calculator. Make sure that the calculator is in degree mode

x≈13.38

Hope this helps!

The table shows a linear relationship between x and y.
x
-6
-3
1
4
Y
21
13.5
3.5
-4

What is the slope of the line represented by the values in the table?

Answers

The slope of the line is: 5/6


Hope this helps!! :)

Does anyone know this?

Answers

Answer:

i think c or b I D K

Step-by-step explanation:


April took out a $600 loan from the
bank. At the end of 5 years, she pays
back the principal, plus $60 simple
interest. What was the interest rate?

Answers

Answer:

2%

Step-by-step explanation:

Answer:

I don’t know

Step-by-step explanation:

Each day of Spirit Week at Alek's school, students have the option of dressing up according to a different theme. On Tuesday of Spirit Week, Alek recorded the number of students at his school by class and style of dress. Here is his data:

Answers

Answer:

D

Step-by-step explanation:

or

This is the conditional distribution of style of dress for freshmen.

The figure below is a prism with a right-triangle base.
What is the surface area of the figure?
Help me please

Answers

it would be answer 3. sorry if it’s wrong

Kaleb is ordering food for his siblings. Each burger costs $4 and each order of fries cost $2 each. Kaleb wants to spend at most $20. Let x represent burgers and y represent fries. a. Write a linear inequality to find the number of burgers and fries Kaleb can buy.

Answers

Answer:

4x + 2y ≤ 20

Step-by-step explanation:

x = burger

y = fries

a.    4x + 2y ≤ 20      at most means ≤

Does anyone know the answer to this? Please help

Answers

so do 4 times 4 then 16 times 16

........................................

Answers

Step-by-step explanation:

(x - 11)² = 72x - 11 = ± √72x = 11 ± √72

The exact solutions are: x = 11 + √72 and x = 11 - √72

The approximate solutions are: x = 19.49 and x = 2.51

[tex]\\ \sf\longmapsto (x-11)^2=72[/tex]

[tex]\\ \sf\longmapsto x-11=\sqrt{72}[/tex]

[tex]\\ \sf\longmapsto x-11=\pm 8.48[/tex]

[tex]\\ \sf\longmapsto x=11-8.48\:or\:11+8.48[/tex]

[tex]\\ \sf\longmapsto x\approx 2.52\:or\:19.48(Approximate)[/tex]

[tex]\\ \sf\longmapsto x=3\:or\:19(Exact)[/tex]

In the formula D = 1 ÷ f, if f is equal to -0.025, then D is equal to

Answers

The answer is D= -40
I’m assuming that you can’t use a calculator in my work:

To solve this I changed the decimal -0.025 into a fraction .25 equals 1/4 so -0.025 must equal negative 1/40. -1/(1/40) equals -40

There are 18x10/1 players in league

part A: The league raised $1,560 through fundraisers. Trenton estimates the cost of buying jackets for each players in the league. He concludes that the league has raised enough money. Do you agree with Trenton? Explain.



part B: how much would it cost to order sweatpants for each player? write and solve an equation with a variable to show your work.


1: Which cost more: 136 sweatpants or 103 sweatshirts? How much more?



Parts A: Coach sandberg wants to order 115 jackets and 27 caps for $12 each.

Estimate the total cost for his order. Show your work


what is his total cost? compare your answer to your estimate

Answers

Answer: a little too late but in case anybody else needs it!

Step-by-step explanation:

Solve the problem using a system of equations: The difference of the squares of two numbers is 15. The difference of twice the square of the first number and the square of the second number is 30. Find the numbers.
(__,__),(__,__)

Answers

The numbers which hold true for the situation modelled in the task content are; (-√15, 0) and (+√15, 0).

Which numbers hold true for the situation?

The system of equations which model the situation is;

x²- y² = 15

2x² - y² = 30.

Hence, by subtracting equation 1 from 2; we have;

x² = 15

x = ±√15.

and hence by substitution; the value of y is;

(√15)² + y = 15

y = 0.

Hence, the required values of the numbers are;

(-√15, 0) and (+√15, 0).

Read more on system of equations;

https://brainly.com/question/14323743

#SPJ1

-17/2 < -1/2 - 4x ≤ 15/2
Please help helphelphelphelphelphelphelphelphelphelphelphelphelphelphelphelphelp​

Answers

Given info: -17/2 < (-1/2) - 4x ≤ 15/2

Find the value of x ?

Explanation:

Given in-equation is -17/2 < (-1/2) - 4x ≤ 15/2

⇛ -17/2 < (-1-8x)/2 ≤ 15/2

On multiplying with 2 then

⇛ 2(-17/2) < 2(-1-8x)/2 ≤ 2(15/2)

⇛ -17 < -1-8x ≤ 15

On adding 1 in the in-equation then

⇛ -17+1 < -1-8x+1 ≤ 15+1

⇛ -16 < -8x ≤ 16

On dividing by 8 in the in-equation then

⇛ -16/8 < -8x/8 ≤ 16/8

⇛ -2 < -x ≤ 2

⇛ 2 > x ≥ - 2

⇛ -2 ≤ x < 2

⇛ x € [-2,2)

Answer:The solution set = { x : -2 ≤ x < 2, x€R }

The possible values of x = -2,-1,0,1

If you have any doubt, then you can ask me in the comments.

help pls anyone? pls​

Answers

Now girl or boy … you don’t own a calculator? That’s easy !

The women's rights movement gained momentum in the 1960s as leaders like Betty Friedan and Gloria Steinem began sharing
their beliefs and concerns regarding discrimination against women. The Equal Rights Amendment called for an end to
discrimination based on gender. Which statement is true regarding the ERA?

Answers

The equal right amendment called for an end to

Question 5 of 10
Which of the following lists of ordered pairs is a function?
A. (1,6), (2, 7), (4,9), (0,5)
B. (2,4), (0, 2), (2, -4), (5,3)
C. (0,2), (2, 3), (0, -2), (4,1)
O D. (1,2), (1, -2), (3, 2), (3, 4)

Answers

Answer:

A

Step-by-step explanation:

Because the x doesn't repeating

Hope it can help you lovelots

#LEARN WITH BRAINLY

Perimeter of a trapezoid is 39a-7. Three sides have the following length 9a, 5a+1, and 17a-6 what is the length of the fourth side

Answers

Answer:

4th side is 8a-2

Step-by-step explanation:

P = 39a-7 - ((17a-6) + (9a) + (5a+1))

P = 39a-7 - (31a-5)

P = 8a-2

What is the sum in 1 1/3+ 2 1/3 + 3 2/3 + 4 1/2 + 5 1/2 + 6 3/4

Answers

Answer:

17.999999999999999

Step-by-step explanation:

Answer:

25 and 1/12

1/3+1/3+2/3+1/2+1/2+3/4 = 4 and 1/12

6+5+4+3+2+1 = 21

Find the value of x. Show all work.
(7x + 6)°
(6x - 7)º

Answers

Answer:

42x-42

Step-by-step explanation:

(7x)(6x)+(6)(-7)=42x°-42°

What is an equation of the line that passes through the point (4, −1) and has
slope −5?

Answers

Answer:

y + 1 = -5(x - 4)

General Formulas and Concepts:

Algebra I

Point-Slope Form: y - y₁ = m(x - x₁)

x₁ - x coordinate y₁ - y coordinate m - slope

Step-by-step explanation:

Step 1: Define

Identify variables.

Point (4, -1) → x₁ = 4, y₁ = -1

Slope m = -5

Step 2: Find Equation

Substitute in variables [Point-Slope Form]:                                                    y - -1 = -5(x - 4)Simplify:                                                                                                             y + 1 = -5(x - 4)

Pahelp yawa T^T[tex]{\blue{\rule{25pt}{1pt}{\purple{\rule{30pt}{3pt}{\red{\rule{50pt}{5pt}{\purple{\rule{30pt}{3pt}{\blue{\rule{25pt}{1pt} }}}}}}}}}}︎︎︎︎︎︎︎︎ ︎︎︎︎︎︎︎︎[/tex]

pasagut 6-7 lang T^T
sabog na akow HAHAH​

Answers

ACcBD

6-7

y < -1 -4

x > -4 y + 2

hope it helps

wait Lang SA 6-7

Answer:

ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok ok

Assuming that the data for all employees follows the same pattern, which kind of relationship is
there between years of higher education and current salary?
A- a clustered relationship
B- there is no relationship
C- a negative correlation
D- a positive correlation

Answers

Answer:

D- A POSITIVE CORRELATION

D.. A POSITIVE CORRELATION

Would anyone be able to help with this?

Answers

hii the answer would be 57°

Can 4x + 10 can be simplified to 14x?

Answers

Answer:

NO

Step-by-step explanation:

“PEMDAS” (parenthesis, exponents, multiplication, division, addition, subtraction)

so you need to sole 4x and after add 10

The answer would be “No” it cannot be simplified .

Start with x and cube it​

Answers

Answer:

x to the power of 3

Step-by-step explanation:

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