Solve the system of equations using elimination 2x+y=3 and 3x-y=12

Answers

Answer 1
2x + y = 3
3x - y = 12
Add both equations
5x = 15, x = 3
2(3) + y = 3
6 + y = 3, y = -3
Solution: x = 3, y = -3... or (3,-3)

Related Questions

What is the value of x the equation 1,3,4,6

Answers

The Answer is 4.

You isolate the variable by dividing each side by factors that don't contain the variable.

Answer:

C 4

Step-by-step explanation:

please help!!! I'm really confused​

Answers

Answer:

1. a

2.c

3.d

4.c

5.b

6.d

Step-by-step explanation:

Find the zero of the
function by
graphing:
f(x) = -2x+6

How do I find the zero?

Answers

Answer:

i think you set the equation to zero

Step-by-step explanation:

Question 3: Jason
receives $40 from
selling 5 adult tickets
and 8 students tickets.
.write an equation to
represent the situation.

Answers

Answer:

$40 = 5a + 8s

Step-by-step explanation:

For this question all we need to know is that $40 is equal to 5 prices of the adult tickets plus the 8 prices of the student tickets. From here we can just give a variable to each price and make an equation, like so

Let "a" be the price of the adult ticket and

Let "s" be the price of the adult ticket, then....

$40 = 5a + 8s

(Just to make sure you understand I will repeat. 5 comes from he fact hat there were 5 adult tickets sold which means that there is 5 adult ticket prices in the $40, and exactly the same reasoning goes for the student tickets, 8 students tickets were sold which means the is 8 prices of the student ticket inside the $40.)

What is the value of z?

Answers

Answer:

z=70 degrees

Step-by-step explanation:

The angle is adjacent to the the angle that = 70 degrees.

need help with math problems​

Answers

Answer:

ok. What’s the problems?

Step-by-step explanation:

LITTLE HELP HERE PEOPLE BTW IF UR RIGHT BRAINLIST IT IS........

Answers

The  formula for the total surface area of a right prism is T. S. A. =ph+2B where p represents the perimeter of the base, h the height of the prism and B the area of the base, I hope this helps.

God bless :)

Answer:

105

Step-by-step explanation:

7×5×3=105 5×3=15. 15×7=105

A copier takes 4 minutes to duplicate 480 pages, Express the rate at which the copier duplicates, in
pages per second,

Answers

Answer:

2 pages per second

Step-by-step explanation:

4*60= 240

480/240=2

2 pages per second

What is 9 plus 10 equals ?

Answers

Answer:

19

Step-by-step explanation:

9+10=19

HELP ASAP SHOW WORK TOO!!! THANKS

Answers

Hope this is what you’re looking for!

The figures are similar, and the ratio of the perimeters is 2 : 5. Find x.

Answers

Answer:

x=3.2

Step-by-step explanation:

8*0.4=3.2

We have that for the Question "The figures are similar, and the ratio of the perimeters is 2 : 5. Find x." it can be said that  the perimeters of x is

x=3.2

From the question we are told

The figures are similar, and the ratio of the perimeters is 2 : 5. Find x.

Generally the equation for the the ratio is mathematically given as

2=x

and

5=8

Therefore

[tex]x=\frac{2*8}{5}[/tex]

x=3.2

Therefore

the perimeters of x is

x=3.2

For more information on this visit

https://brainly.com/question/19007362?referrer=searchResults

multiply these -3/7 times by 3/8

Answers

Answer:

Fraction: -9/56

Decimal: -0.16071428 (-0.16)

Step-by-step explanation:

Multiply, then use a fraction-to-decimal calculator.

Brainliest Please!

A car is traveling at a speed of 72 kilometers per hour. What is the car's speed in kilometers per minute? How many kilometers will the car travel in 2 minutes?
Do not round your answers.

Answers

72/60 to get the speed per minute which is 1.2 miles per minute. From there you can just multiply by 2 to get how far the car will travel in two minutes which is 2.4 kilometers. Not rounded btw.

For the diagram below find the missing values.

Answers

Answer:

y = 35

x = 86

Step-by-step explanation:

i gave up on making the explanation... its too hard to explain, sorry :(

Kara takes 4.5 hours
to deliver 396
newspapers. What is
the rate per hour
she is delivering the
newspapers?
7 RP 1

Answers

88 newspapers per hour

One fifth of a number plus three times the number is equal to 42 Moré than twice the number. Whats the number

Answers

Answer:

35

Step-by-step explanation:

Let number = x

(1/5 of x) + (3 * x) = 42 + (2 * x)

x/5 + 3x = 42 + 2x

1/5x + 3x - 2x = 42

1 1/5x = 42

6/5 x = 42

x = 42 ÷ 6/5

x = 42 * 5/6

x = 210 / 6

x = 35

The number is 35

PLZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ HELP AND SHOW YOUR WORK


Solve the solution to the inequality below.

-2n+5>1

Answers

Answer:

n<2

Step-by-step explanation:

-2n+5>1

-2n>1-5

(-2n>-4)divide by -2

Answer:

n<2

Step-by-step explanation:

Solve the Inequality for n

Isolate the variable by dividing each side by factors that don't contain the variable.

-2n+5>1

-2n>1-5

(-2n>-4)divide by -2

Interval Notation: (−∞,2)

Find the remainder when 17523^8 is divided by 9^10.

Answers

Answer:

the answer is 2.549442707[tex]2^{24}[/tex]

Paula wants to buy 3 shirts and 2 belts. The shirts cost $16.89 each, and the belts cost $8.97 each. Paula has $45. Which of these amounts is the best estimate of how much more money Paula needs in order to buy the shirts and belts? A) $16 B) $10 C) $24 D) $5​

Answers

C should be the answer because all the rest have less than $24

If f(x) = -4x + 3 and g(x) = 3x^2 + 2x - 4 find (f+g) (x)

Answers

Answer:

3x^2-2x-1

Step-by-step explanation:

Here, we want to find (f + g)(x)

Mathematically, that will be f(x) + g(x)

= -4x + 3 + 3x^2 + 2x -4

= -2x-1 + 3x^2

= 3x^2-2x-1

Jimmy has $88 in his piggy bank. He is saving his
allowance of $15 per week and putting it in his piggy
bank as well. The amount of money in the piggy bank,
y dollars, is a function of the number of weeks saved, x.

a.) Write an algebraic equation for this function.

b.) Construct a table for x and y values for the function above.

Use values for x from 0 to 5.

c.) If Jimmy wants to buy a new video game system for $250, how
many weeks allowance will he need to save?


(This isn't a mutiple choice question)

Answers

Answer:

88/15=5.86666666667

Step-by-step explanation:

5.86666666667 because it is

The sum of two numbers is 0. Twice the smaller numbers subtracted from 3 times the larger number is 10. Let X represent the larger number and y represent the smaller number. Which equations represent this situaation?

Answers

Answer:

x+y=0 and

3x-2y=10

Step-by-step explanation:

x+y=0——equation 1

3x-2y=10——equation 2

Above are the equations

Last year the 7th grade class had 350 students. This year the number decreased 36%. How many students are in this year's 7th grade class?

Answers

Answer:

224

Step-by-step explanation:

350-36%=224. easy as that.

2. Write two hundred seventy-one
and 25 hundredths as a decimal.

Answers

Answer:

It is 271.25

Answer:

271.25

Step-by-step explanation:

20 POINTS
510√




a2√2

b5√

c10√2

d2√

Answers

Answer:

wdym its only 5 points

Step-by-step explanation:

Are these parallel, perpendicular, or neither?

Answers

Answer: I think it’s neither

Explanation:

The line is parallel unless the slope is the same and with a different y-intercept

The line are perpendicular unless the one of the slope is the negative reciprocal of the other.

And both equation didn’t meet any of the requirement.

PLEASE HELP!!! The population of a town was 780 in 1970. The population has been growing at a rate of 26% each year. What is the population of the town in the year 1995? Round your answer to the nearest whole number.

Answers

I could be wrong but I think it’s 787 (786.5 but rounded would be 787)

PLEASE HELP!!!! PRQ = ?

Answers

PRQ=VXW

I think! I hope this helps!

the officcal size of a basketball court in the nba is 94 feet by 50 feet. The basketball court in the school gym is the 47 feet long

Answers

Answer:

91

Step-by-step explanation:

What’s is the sum of 2 - the square root of -4 and -3 + the square root of - 16

Answers

Answer:

(2-i√7)+(4i)

Step-by-step explanation:

(2-[tex]\sqrt{-4+-3}[/tex])+ ([tex]\sqrt{-16}[/tex] )

(2-i√7)+(4i)

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