Solve the system by the elimination method *
2x – 3y = 12
2x + y = 4

Answers

Answer 1

Answer:

4

Step-by-step explanation:


Related Questions

If [tex]f(x)=3^x[/tex], prove that [tex]f(x) + f(x+1)=4f(x)[/tex]

Answers

[tex]$f(x)+f(x+1) \stackrel{1}{=} 3^x+3^{x+1} \stackrel{2}{=} 3^x+3^x\cdot3^1\stackrel{3}{=}3^x+3\cdot3^x\stackrel{4}{=}4\cdot3^x\stackrel{5}{=}4\cdot f(x)[/tex]

1) Substitution from definition.

2) We use [tex]$x^{a+b}=x^a\cdot x^b[/tex]

3) We are changing the order of 3 and [tex]3^x[/tex].

4) We add 1 and 3 [tex]3^x[/tex] and we get [tex]4\cdot 3^x[/tex]

5) Substitution from definition (but the other way than at the beginning).

How do you translate "Twelve decreased by a quarter of number, x. in a variable expression​

Answers

Answer:

12 - (¼*x)

Step-by-step explanation:

If something is "decreased by" in mathematics we are looking at a minus sign (-).

For instance 5 decreased by 2 is 5 - 2

please help me out on this! i really need it!!

Answers

Joni's calculation is the most accurate. Hope my answer helped u :)

Give the geometric representation of 2x+ 1= x-4 as an equation in (a) one variable (b) two variables

please help

Answers

Answer:

Step-by-step explanation:

2x+1=x-4

2x-x= -4-1

1x=-5

x=-5

Please Help. If m ∠ EJF=56, find m ∠ FHK.

Answers

Answer: 124 degrees

========================================================

Explanation:

If we assume these two things:

JC parallel to KDJA parallel to HB

Then this would allow us to say that angle EJF = angle FHG because they are corresponding angles.

So that means angle FHG = 56

This then leads to:

angle FHK = 180 - (angle FHG) = 180 - 56 = 124 degrees

a man bought a 4 kg apples at the rate of rs 50 per kg he sold 3 kg apples at the rate of rs 65 and 1 kg apples at rs 40 find his profit or loss amount.​

Answers

Answer:

35rs of profit

Step-by-step explanation:

4*50=200rs- he spent

3*65+1*40=195+40=235rs- he got

235-200=35rs of profit

Sarah counted the number of tiles at each step and made a table. She explained that the
number of tiles in each figure was always 3 times the step number minus 2.

Create an equation that fits Sarah's way of seeing the relationship.

PLS HELP DUE IN 10 min!!

Answers

Answer:

n(number of tiles) x 3 - 2

Step-by-step explanation:

times mean multiplication and minus mean subtraction, I hope this helps.

An equation is formed of two equal expressions. An equation that fits Sarah's way of seeing the relationship is y = 3x - 2.

What is an equation?

An equation is formed when two equal expressions are equated together with the help of an equal sign '='.

As stated by Sarah that "the number of tiles in each figure was always 3 times the step number minus 2", this can be written in the form of an equation as shown below.

Number of tiles = [3 × (Number of steps)] - 2

Assume that the number of tiles is represented by y, while the number of steps can be written as x. Therefore, we can write the equation as,

y = 3x - 2

Now, let's check the equation,

When the number of steps is 3, the number of tiles is 7.

y = 3(3) - 2

y = 9 - 2

y = 7

Since the number of tiles is the same, therefore, the equation is correct.

Hence, an equation that fits Sarah's way of seeing the relationship is y = 3x - 2.

Learn more about Equation here:

https://brainly.com/question/14686792

#SPJ2

Y is between X and Z. T is
between Y and Z. If XZ = 90, YT = 22, and XY = TZ, what is XT?

(step-by-step pls)

Answers

Y is between X and Z. T is
between Y and Z. If XZ = 90, YT = 22, and XY = TZ, what is XT?

=XZ=90
YT=22
XY=TZ
XT=90–22
XT=68

17. In a speech class, students must give a final speech for their exam. The speech can be 15 minutes, or within that time by 4 minutes. Write an absolute value equation that represents the minimum and maximum lengths of the final speech ​

Answers

Answer:

| t − 15 | = 4

Step-by-step explanation:

absolute value is weird and i see no use for it

Joe was driving on the highway a car ahead of him was driving far below the speed limit so he decided to pass. In the first second he gained(gained means to get nearer to something you are chasing) 5m on the car and as he accelerated he gained 1.5 times as much distance in each second as he had the second before. If there was 30 m between joe and the car he was passing then how long did it take him to pass

Answers

Answer:

537/100s.

Step-by-step explanation:

Determine whether each pair of segments is congruent.

Plz can someone help me

Answers

Answer:

23. Congruent

24. Not congruent

Step-by-step explanation:

23. KJ and HL:

Since the side lengths are both 4 in, these segments are congruent.

24. EH and FG:

Since the side lengths are different numbers (0.45 cm and 0.5 cm), these segments are not congruent.

The answer is KJ and HL. Only the first one is congruent because both lines EH and FG don’t have sides with equal measurement.

Please help me out, giving brainliest. Show your work pls!

Answers

Answer: The solution is in the attached file below

Step-by-step explanation:

[tex]\frac{1}{3} (21y + 39) = -36[/tex]

Answers

1/3(21y+39)=-26 can be simplified into

7y +13 = -26

Next, subtract 13 from both sides

7y= -39

Now divide both sides by 7

Your answer is y=-39/7

Answer:

y = -7

Step-by-step explanation:

1/3 (21y+39) = -36

Distribute

7y +13 = -36

Subtract 13 from each side

7y+13-13 = -36-13

7y = -49

Divide each side by 7

7y/7 = -49/7

y = -7

Please help on the question below
Any help is appreciated, thank you:)​

Answers

Answer:

Here is your answer...

Hope it helps

Simplify the expression to a polynomial in standard form:
(3x2 - 4x – 5)(-2x2 + 2x + 2)

Answers

Answer:

- 6[tex]x^{4}[/tex] + 14x³ + 8x² - 18x - 10

Step-by-step explanation:

Given

(3x² - 4x - 5)(- 2x² + 2x + 2)

Each term in the second factor is multiplied by each term in the first factor, that is

3x²(- 2x² + 2x + 2) - 4x(- 2x² + 2x + 2) - 5(- 2x² + 2x + 2) ← distribute parenthesis

= - 6[tex]x^{4}[/tex] + 6x³ + 6x² + 8x³ - 8x² - 8x + 10x² - 10x - 10 ← collect like terms

= - 6[tex]x^{4}[/tex] + 14x³ + 8x² - 18x - 10

Which of the following is most likely the next step in the series?
A.
B.
C.
D.

Answers

Answer:

A

Step-by-step explanation:

If you look at the number of dots in each circle, it is increased by 1 every picture so if we have 4 in the third circle, then we will have 5 in the fourth picture. Option A is the only option that contains 5 dots.

Best of Luck!

..... + ..... x ..... = 1452​

Answers

Answer:

452 + 100 × 10 = 1452

Step-by-step explanation:

There are many possible solutions. This is one of them.

5 x (-4)-((-6)-7)
(The X means to multiply)

Answers

Answer:

[tex] - 62[/tex]

Step-by-step explanation:

[tex]5 \times ( - 4) - (( - 6) - 7) \\ = - 20 - 42 \\ = - 62[/tex]

Hope it is helpful.....

1/5 part of pole is inside the mud, 2/3 part is inside the water and the remaining length of 10m is above the surface of the water. Find the length of the pole .

Answers

Answer:

75m

Step-by-step explanation:

let X be the length of the pole1/5 of the pole is in water so =1/5X2/3 of the pole is in mud= 2/3X10m is above the polelength of the pole (X)= length of pole in mud+length of pole in water+length of pole in airX(m)=1/5X+ 2/3X+10X- 13/15X=102X= 10x15X=75m

I really need some help again

Answers

The slope is the “change in y over the change in x,” also referred to as “rise over run.”

Pick any two points and calculate the difference in their y-values and divide that by the difference in their x-values.

Notice that all y-values are the same, so your “change in y” or your “rise” is always 0.

0/anything = 0 (as long as the denominator isn’t 0)

So, your slope here is 0.

i really need this answer

Answers

Yes what u put was correct have a very very good day

Sam has a bookcase with n shelves there are 13 books on each shelf using n wrote an expression for the total number of books

Answers

Answer:

13n

Step-by-step explanation:

13*n

The length and breadth of a retanlge are (2x+y) cm (x+2y)cm respectively. Find its area.​

Answers

Answer:

2x^2+5xy+2y^2

Step-by-step explanation:

Area = l*b

Area = (2x+y)*(x+2y)

Area = 2x^2+5xy+2y^2

At the beginning of the school year, Jamie had
$500 in her savings account. She wants to have at
least $200 left in the account at the end of the
school year. Each week, she withdraws $30 for
spending money. To determine how many weeks
she can spend $30, Jamie wrote and solved this
inequality

Answers

Answer:

Hmmm let me solve then I will answer

Solve for x: -2 - 4 > 8
(9th grade Algebra 1)

Answers

Answer:

A

Step-by-step explanation:

-2x-4>8

-2x>12

-x>6

x<-6

Answer:

[tex]x < - 6[/tex] (first option)

Step-by-step explanation:

[tex] - 2x - 4 > 8[/tex]

[tex] - 2x > 8 + 4[/tex]

[tex] - 2x > 12[/tex]

[tex] = x < - 6[/tex]

What is this question? (−5)4

Answers

negative 5 times 4 so it would be -20

Answer:

I hope it will be -20 please mark me brainleast

convert 550 minutes into weeks

Answers

Answer:

0.0545635

Step-by-step explanation:

divide the time value by 10080

0.0546 weeks

explain your answer

Please help its line segments

Answers

Step-by-step explanation:

[tex]thank \: you[/tex]

Brier has 2 hours to finish a slide presentation. It takes him 1/6 hours to create each slide. How many slides can he creat in 2 hours?

Answers

Answer:

12 slides

Step-by-step explanation:

If he can make 6 slides in each hour, and he has 2 hours, take 6x2=12 because there are 2 hours.

A.
absence of a cell wall
B.
absence of a nucleoid
C.
presence of chloroplast
D.
presence of a vacuole

Answers

hi <3

i'm not sure how many options you are allowed to select but the answers would be option C and D, as both of these structures are found in plant cells and not animal cells

hope this helps :)

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