how do you solve this (first equation) x=2y-1 (second equation) x+y=40

Answers

Answer 1

Answer:

[tex]x = 26 \frac{1}{3} \\ [/tex]

[tex]y = 13 \frac{2}{3} \\ [/tex]

Step-by-step explanation:

x = 2y - 1

x - 2y = -1 ________(1)

x + y = 40________(2)

(2) - (1)

[tex]x + y - (x - 2y) = 40 - ( - 1) \\ x + y - x + 2y = 40 + 1 \\ 3y = 41 \\ y = \frac{41}{3} \\ y = 13 \frac{2}{3} \\ [/tex]

y = 13 2/3

[tex]x + y = 40 \\ x + 13 \frac{2}{3} = 40 \\ x = 40 - 13 \frac{2}{3} \\ x = 40 - \frac{41}{3} \\ x = \frac{3(40) - 41}{3} \\ x = \frac{120 - 41}{3} \\ x = \frac{79}{3} \\ x = 26 \frac{1}{3} \\ [/tex]


Related Questions

2 divided by 2348=? plz help

Answers

Answer:

0.00085

                   

Hope this helps

Answer:

0.00085

Step-by-step explanation:

2/2348= 0.00085

please help my teacher make me do all of this
Review Directions: Solve each of the following equations. 1. 2x - 12 = 6 1. 2x - 12 = 6 2. 2x + 6= 8 3. 12s - 12=12 4. 14s + 6 = 35 5. 3s - 12 = 6 6. 18t + 9 = 34 7. 21x + 7 = 28 8. 50y + 5 = 105 9. 1/4x - 6 = 24 10. 13x + 2 = 18 11. 6 - 3x = 18 12. 14 + s = 21 13. 16x - 4 = 28 14. 19x - 1 + 3 = 40 15. 10t = 194 16. 400x + 100 = 1100 17. 40 - 3x + 3 = 113 2. 2x + 6= 8 3. 12s - 12=12 4. 14s + 6 = 35 5. 3s - 12 = 6 6. 18t + 9 = 34 7. 21x + 7 = 28 8. 50y + 5 = 105 9. 1/4x - 6 = 24 10. 13x + 2 = 18 11. 6 - 3x = 18 12. 14 + s = 21 13. 16x - 4 = 28 14. 19x - 1 + 3 = 40 15. 10t = 194 16. 400x + 100 = 1100 17. 40 - 3x + 3 = 113

Answers

Doing it now. It may take a minute, but i got you :)

need help with #10 please

Answers

Answer:

Domain = (infinity, infinity) Range = (3,0)

Step-by-step explanation:

Hard to explain without giving a 15 minute lecture lol

Order from least to greatest. 5/12, 2/3, 1/2, 5/6, 3/4A) 3/4, 5/6, 2/3,1/2, 5/12B) 5/12, 1/2, 2/3, 3/4, 5/6C) 1/2, 2/3, 3/4, 5/6, 5/12D) 1/2, 2/3, 5/6, 3/4, 5/12

Answers

Answer:

B) 5/12, 1/2, 2/3, 3/4, 5/6

Step-by-step explanation:

You want to get all the fractions to the common denominator, which in this case is 12. once you do this you can easily order them from least to greatest. Here are the fractions with the common denominator.

2/3 = 8/12

1/2 = 6/12

5/6 = 10/12

3/4 = 9/12

Once you have all these with the same denominator, you order them from least to greatest, which gets you the answer (B.)

Evaluate 3x – 6 + 5x - 1 when x =-3

Answers

Answer:

-31

Step-by-step explanation:

1. To evaluate this expression when x = -3, we just have to plug in the x-value and simplify.

[tex]3x - 6 + 5x - 1[/tex] [tex]3(-3)-6+5(-3)-1[/tex] [tex]-9 - 6 - 15 - 1[/tex] [tex]-15 - 15 - 1[/tex] [tex]-30 - 1[/tex] [tex]-31[/tex]

Therefore, the answer is -31.

You just plug in -3 where X is so the answer is -31 :))

3 In which of these pairs of numbers would both numbers round to 6.23 ? F 6.232 and 6.236 G 6.231 and 6.233 H 6.229 and 6.239 J 6.222 and 6.238 GO ​

Answers

9514 1404 393

Answer:

  G 6.231 and 6.233

Step-by-step explanation:

F 6.232 and 6.236 rounds to 6.23, 6.24

G 6.231 and 6.233 rounds to 6.23, 6.23

H 6.229 and 6.239 rounds to 6.23, 6.24

J 6.222 and 6.238 rounds to 6.22, 6.24

_____

One way to determine the rounded value is to add 0.005 to the number, then drop all digits to the right of the hundredths place.

Examples:

  6.222 +0.005 = 6.227 ⇒ 6.22

  6.238 +0.005 = 6.243 ⇒ 6.24

Which of the following describes a gerund and how it functions in a sentence? (1 point)
O A gerund is a noun that functions as the subject of a sentence.
O A gerund is a noun that functions as the direct object receiving the action in a sentence.
O A gerund is a verb ending in -ing that functions as a verb in a sentence.
O A gerund is a verb ending in -ing that functions as a noun in a sentence.

Answers

Answer:

a

Step-by-step explanation:

The accurate definition of the gerund and its purposes is "gerund is a verb ending in -ing that serves as a noun in a phrase." Thus, option fourth is correct.

What is sentence?

Sentence refers to a set of words that are appropriately ordered in a line and provide the sense or meaning. When the line imparts meaning to the words, it is considered to be a sentence.

A combination of words that may transmit a statement, question, exclamation, or demand on their own. Sentences generally include a subject and a predicate, as well as one main clause and one or more subsidiary clauses.

Gerund is a verb form that includes -ing at the end of the word and functions as a noun in the phrase. Gerunds, like the other two forms of verbals, are founded on a verb and hence reflect the verbal category.

Therefore, it can be concluded that option fourth is correct.

Learn more about gerund here:

https://brainly.com/question/11017355

#SPJ2

Evaluate the equation: 7.15e = 64.35

Answers

Answer:

Simplifying

7.15e = 64.35

Solving

7.15e = 64.35

Solving for variable 'e'.

Move all terms containing e to the left, all other terms to the right.

Divide each side by '7.15'.

e = 9

Simplifying

e = 9

Answer:9

Step-by-step explanation:

x : y : z = 2 : 3 : 5 và x-y+3z= -28

Answers

Answer:

2 - 3 + 15 = 14

Step-by-step explanation:

what number when decreased by 10% is 180?​

Answers

Answer:

Number 200 decreased by 10% (10 percent) of its value (percentage decrease) and calculated absolute change (actual difference). Answer: percentage decreased number = 180, absolute change (actual difference) = -20

Step-by-step explanation:

Answer:

162

Step-by-step explanation:

180 - 10% = 162 so 162 is the answer

i need help plz..................................

Answers

CHIPOTLE, CHICK-FIL-A, BURGER KING, MCDONALDS… ETC.

Nine less than a number is five

Answers

Answer:

x-9=5

Step-by-step explanation:

Maksksksksksklsksoskm

HELP PLSSSS!!! I will mark you as brainlyist

Answers

X = 15°

Given that the angle with m < 165° and m< x° are supplementary angles whose sum add up to 180°,

We can add their sum by establishing the following formula:

m < 165° + x° = 180°
Subtract m< 165° from both sides

m < 165° — m < 165° + x° = 180° — m < 165°

x° = 180° — m < 165°

x° = 15°

Therefore, the value of x = 15 °

Simone works at an assembly plant she made 490 items in five days how many items did she average per day?

Answers

Answer:

98 per day

Step-by-step explanation:

490 / 5

= 98

will give brainliest to the correct answer
there are 192 candies. some are sour and some are sweet. for every 15 sour there is 1 sweet. how many candies are in the bag? how many are sweet?

Answers

there are 192 candies in the bag
13 are sweet and 179 are sour
i hope this helps and is the correct answer

The lines given by the equations y = 2x and y= 2x + 1 are
A. Parallel
B. Perpendicular
C. Neither Perpendicular nor parallel

Answers

A. is the answer i’m pretty sure

*This problem is all about Multiplication Comparison*

How long is Pine Street?

Answers

Answer:

7

Step-by-step explanation:

Pine Street in x miles long.

Maple street is 3 times as long as Pine Street, so Maple street is 3x miles long.

Maple street is 21 miles long.

3x = 21

x = 7

Maple Street is 7 miles long.

How much of the circle is shaded? Write your answer as a fraction in simplest form? 3/7 and 1/3 isn't shaded ​

Answers

Answer:

[tex]total = 1 \\ \frac{1}{2} + \frac{1}{7} + x = 1 \\ \frac{1}{7} + x = 1 - \frac{1}{2} \\ \frac{1}{7} + x = \frac{1}{2} \\ x = \frac{1}{2} - \frac{1}{7} \\ x = \frac{7 - 2}{7 \times 2} \\ x = \frac{5}{14} \\ \\ shaded \: portin \: = \frac{5}{14} \\ thank \: you[/tex]

Answer:

[tex]\frac{5}{14}[/tex]

Step-by-step explanation:

Half the circle ( to the left ) is partly shaded

shaded part = [tex]\frac{1}{2}[/tex] - [tex]\frac{1}{7}[/tex] = [tex]\frac{7}{14}[/tex] - [tex]\frac{2}{14}[/tex] = [tex]\frac{5}{14}[/tex]

Select the only true statement from the following.



Opposite numbers have different signs and are different distances from zero.


Opposite numbers have the same sign and are the same distance from zero.


Opposite numbers have different signs but are the same distance from zero.


Opposite numbers have the same sign but are different distances from zero.

Answers

Answer:

the third one

Step-by-step explanation:

What is the slope of the line represented by the equation y = 4/5x - 3

Answers

Answer:

4/5

Step-by-step explanation:

the slope is the number next to x

y=mx+b is a model we use in math to find the slope. each letter is a place marker for different numbers.

slope is where the m is in the problem

in your case 4/5 is found in the same spot as m.

Find the value of y' when x
O if
xy^8 + e^y/5 =
= e.

Answers

It looks like the given equation says

[tex]xy^8 + e^{y/5} = e[/tex]

When x = 0, you have

[tex]0\cdot y^8 + e^{y/5} = e \\\\ e^{y/5} = e^1 \\\\ \dfrac y5 = 1 \\\\ y=5[/tex]

Differentiating both sides with respect to x gives

[tex]\left(xy^8 + e^{y/5}\right)' = e' \\\\ \left(xy^8\right)' + \left(e^{y/5}\right)' = 0 \\\\ x\left(y^8\right)' + x'y^8 + e^{y/5}\left(\dfrac y5\right)' = 0 \\\\ 8xy^7y' + y^8 + \dfrac15e^{y/5}y' = 0[/tex]

That is, the derivative operator distributes over sums, and the derivative of a constant is 0; apply the product rule on the first term and chain rule on the second; then use chain rule one more time.

Now plug in x = 0 and y = 5, and solve for y' :

[tex]8\cdot0\cdot5^7y' + 5^8 + \dfrac15e^{5/5}y' = 0 \\\\ 5^8 + \dfrac15e y' = 0 \\\\ \dfrac15e y' = -5^8 \\\\ y' = \boxed{-\dfrac{5^9}e}[/tex]

a. After Pam bought the party supplies, what is the balance of her bank account compared with her
starting balance? Show your work.

Answers

Answer:

What is the original Balance, and what is the price of the party supplies?

III
O SYSTEMS OF LINEAR EQUATIONS
At a basketball game, a vendor sold a combined total of 150 sodas and hot dogs. The number of sodas sold was 30 more than the number of hot dogs sold. Find
the number of sodas sold and the number of hot dogs sold.
Number of sodas sold:
Number of here

Answers

Creo que es multiplicando 4,500

If the sum of two integers are negative. Must both integers be negative

Answers

Answer:

Not necessarily. There are many ways to write a basic equation with a negative answer. For example, -3-4 = -7.

Step-by-step explanation:

No because if the negative has a bigger number than the positive cant over run it and make it positive
Ex. -10+5=-5
-19+15=4

please help i dont understand this

Answers

Answer:

I would try cymath

I can't solve this so I would use cymath or copy and paste your answer to go 0gle and you might find another brainly question with this

Combine Like Terms:

12 + 16 + 9x^2

Answers

28+9x^2

12+16=28. This is the only adding you have to do since unlike 9x there is no variable or other terms so you leave the 9x^2 alone

NEED HELP ASAP....................

Answers

Answer:

not equivalent

Step-by-step explanation:

i believe this should be right

The marksobtained by a group of students in science test are 90, 49, 87, 74,80, 85, 49
Find the
a) Median
b) Mode
c) Range

Answers

Answer:

1. Median refers to the central value of a collection of data

Therefore it is 73.4

2. Mode refers to the frequency of a value in a collection of data

It will be 49 as it is repeated 2 times

3. Range refers to The greatest number subtracted from the smallest number

Which will be 90-49=41

Hope this helps dude!

Please mark me as brainliest

Use the midpoint formula to find the midpoint of (4, -2) and (6, 10)

Answers

The midpoint coordinates would be
(5,4) that is your answer

Answer:

the mid point in x axis is half of 6-4 which =1

the mid point in y axis is half of 10-(-2) which=6

hence he midpoint is (1,6)

9x-5
14x+24 A

Determine the value of x.

A) x = 32.2
B) x = -5.8
C) x = -7
D) x = 7​

Answers

Answer:

letter

B. =-5.8

Step-by-step explanation:

hope its help