Plz can someone help me show work for these two problems!!

3x + y = 13

2x - y = -1

Answers

Answer 1

Answer:

3x +y = 13

Or, x=13-y/3......eqn(i)

Now putting the value of x

2x - y = - 1

Or, 2(13-y/3) - y = - 1

Or, 26 - 2y /3 - y = -1

Or, 26 - 2y - 3y = - 3

Or, 26 - 5y = - 3

Or, - 5y = - 3 - 26

Or,y = - 39/ (- 5)

Or, y = 7.8~


Related Questions

When two dice are rolled find the probability of getting a sum of 6 or 7 PLEASE ANDWER QUICK IM TAKINN A TEST

Answers

Answer:

y=mx+b hope this helps

Step-by-step explanation:

Answer:

11/36

Step-by-step explanation:

5. Which number is irrational? 3 (1) V16 (2) V12 (3) (4) 0.50

Answers

Answer:

(3)√12

Step-by-step explanation:

The other numbers are not continuous

General admission tickets to the fair cost $5 per person. Ride passes cost an
additional $7.50 per person. Parking costs $16 for the family. The total costs for
ride passes and parking was $103.50. How many people in the family attended
the fair?

Answers

$103.50 - $16 = $87.5
total cost of admission and ride pass per person = $5 + $7.50 = $12.50

no. of people in the family = $87.50/$12.50
= 7

A telephone pole is 24 feet tall. A support cable is attached to the top of the pole to keep the pole from leaning. The stake for the cable is set in the ground 18 feet away from the base of the pole, as shown. How long is the support cable?

Answers

Answer:

30

Step-by-step explanation:

Answer:

30

Step-by-step explanation:

Tom has a part-time job. On Wednesday, Tom earned $20.50, and on Thursday he earned $36.21. On Friday, Tom earned twice as much as he did on Wednesday. How much did Tom earn altogether for the three days?

Show or explain your work.

Answers

20.50+36.21=56.57
Twice can be said as x2 so
20.50 x2=41
Leaving 56.57 and 41
56.67+41=91.67

Urgent !!!

Select the correct answer.
The domain, range, and x-intercept of a one-to-one function are shown.

Answers

The answer is D i think

HELP PLS
What are the domain and range of the exponential decay function?
A) Domain: All real numbers; Range: All real numbers
B) Domain: x< 3; Range: y> 3
C) Domain: All real numbers; Range: y> 3
D) Domain: x > 3; Range: All real numbers

Answers

Answer:

Thus the domain is the real numbers and the range is y>3.

Answer: Option C)

Step-by-step explanation:

Domain and Range of Functions

To determine the domain and range of a function given on a graph, we use the vertical and horizontal line methods respectively.

The domain consists of all the values of x for which the function exists. We are told that the function is an exponential decay. Exponential functions without specified restrictions have a domain of all the real numbers.

Imagine a vertical line moving from minus infinite x to plus infinite. The line would always cross the graph at one point, thus the domain is all the real numbers.

Now for the range, imagine a horizontal line coming from y minus infinite. It won't get in contact with the graph until it approaches y=3. Once it goes up y=3, the line touches the graph in one point up to infinity y. The range is y>3.

Thus the domain is the real numbers and the range is y>3.

Answer: Option C)

A number x is greater than 3.

Answers

Answer:

4,5,6,7,8,9..........................

Plz help it’s due tonight!!!!

Answers

Answer:

Sorry I can’t read it wish I could help man have a good day and be safe, wear a mask in public, sanit- jk! Just be kind to others and be safe love ya!

Step-by-step explanation:

What is the next term of the geometric sequence?
-16/5 ,8, -20,

Answers

Answer:

common ratio(r)= 8÷(-16/5)= -20/8= -2.5 or -5/2

Gn=G1r^(n-1)

the next term will be the 4th term, means n=4

G4= (-16/5)((-5/2)^(4-1)

=(-16/5)(-125/8)

=50

Therefore the next term will be 4th term(G4)=50.

The next term of Sequence is 50.

What is Geometric Sequence?

A geometric sequence is a set of integers that follows a pattern in which the following term is determined by multiplying the previous one by a factor known as the common ratio, or r.

An example of a Geometric sequence is 2, 4, 8, 16, 32, 64, …, where the common ratio is 2.

Given:

-16/5 ,8, -20,

First, common ratio(r) = 8÷ (-16/5)

                                    = -20/8

                                    = -2.5 or -5/2

Now,[tex]G_n=G_1r^{(n-1)[/tex] and for n=4

[tex]G_4[/tex] = (-16/5) [tex](-5/2)^{(4-1)[/tex]

=(-16/5)(-125/8)

=50

Hence, the next term is 50.

Learn more about Geometric Sequence here:

https://brainly.com/question/11266123

#SPJ2

ty and his 3 brothers share a pizza equally what is the fraction

Answers

Answer:

If they all get an equal slice, 1/4.

Step-by-step explanation:

Mr. Hudson is a car salesman. He makes a fixed amount of $1,000 a month and receives $250 for every car that he sells. Which inequality shows the number of cars, n, Mr. Hudson must sell in a month to earn a minimum of $6,000?

Answers

Answer:

250n + 1,000 ≥ 6,000

Step-by-step explanation:

You know that he makes 250 dollars per car her sells and he automatically makes 1000 per month. n is representing the number of cars he sold and that is multiplied by the worth of each car. If he needs a MINIMUM of 6000 dollars. he must make 6000 dollars or more which can also be shown as ≥. Hope this helped!

can someone help with this one too?​

Answers

Answer:

the answer is C

Step-by-step explanation:

Yes C is the right answer I just did that almost same question

En una pasteleria realizan 15 posteles cada 30 min
Cuantas pasters se haran en 4 horas con 15 min?

Answers

Answer:

60

Step-by-step explanation:

había multiplicado 4 y 15 espero que esto ayude

Please help me!!! I will mark.

Answers

Answer:

the answer is the first one!

because if x=-3 we know that |x|=|-3|=3

An exam worth 388 points contains 65 questions. Some questions are worth 4 points and the others are worth 8 points. How many 4 point questions are on the test?

Answers

Answer:

33 questions.

Step-by-step explanation:

Let x = 4 points questions.

Let y = 8 points questions.

Translating the word problem into an algebraic equation;

For the total number of questions;

[tex] x + y = 65[/tex] .........equation 1

For the total number of points;

[tex] 4x + 8y = 388[/tex] ..........equation 2

Given the following data;

Total number of questions = 65

Total number of points = 333

Solving the linear equation by using the substitution method;

Making x the subject in equation 1:

[tex] x = 65 - y[/tex] .......equation 3

Substituting "x" into equation 2;

[tex] 4(65 - y) + 8y = 388[/tex]

Simplifying the equation, we have;

[tex] 260 - 4y + 8y = 388[/tex]

[tex] 260 + 4y = 388[/tex]

Rearranging the equation, we have;

[tex] 4y = 388 - 260[/tex]

[tex] 4y = 128[/tex]

[tex] y = \frac {128}{4} [/tex]

y = 32 (For the 8 points question).

Substituting "y" into equation 3;

[tex] x = 65 - 32[/tex]

x = 33 (For the 4 points question).

Therefore, the number of 4 point questions on the test are 33 questions.

$4.30 makeup; 40% discount 6% tax ???

Answers

$2.73 is your total. $4.30 with the 40% discount lowers the price to $2.58, then you find the 6% tax of the new price which is 0.1548 which rounds to 15¢, then add the tax to the total $2.58+ $0.15 = $2.73

1,800 divided by what equals 90

Answers

Answer:

20

Step-by-step explanation:

Answer:

1800 divded by 20=90

Step-by-step explanation:

y + 4 = 14(x-12), determine the slope and the y-intercept.

Answers

Answer:

Step-by-step explanation:

y + 4 = 14(x - 12)

y + 4 = 14x - 168

y = 14x - 168 - 4

y = 14x - 172

The slope is 14
The y-intercept is ( 0 , -172 )

15 people working 5 hours per day can make 30 units of a product in 10 days. Assuming all other factors remain constant and people of the same efficiency are used to make the same products, in how many days can 10 people make 10 units of the product if each of them works 10 hours per day?

Answers

Answer:

I don't really understand it very well

It will take 10 people working 10 hours per day about 2.5 days to make 10 units of the product.

From the statement of the question; 15 people working 5 hours per day can make 30 units of a product in 10 days. Hence, the number of units that can be made in a day is;

Number of units per day = (15*5*10)/30

= 25 units/day

Now; if 10 people make 10 units, working 10 hours per day, it will take them x number of days.

x =  (25*10)/10*10

x = 2.5 days

Learn more: https://brainly.com/question/22873736

y = 3x – 21 is it proportional

Answers

Answer:

yes  

Step-by-step explanation:

2x+3y = 17
2y + z = 1
5x +10z = 25

Find x

Answers

Answer:

x = 7

Step-by-step explanation:

Given the equations

2x + 3y = 17 → (1)

2y + z = 1 → (2)

5x + 10z = 25 → (3)

Rearrange (2) expressing z in terms of y

z = 1 - 2y

Substitute z = 1 - 2y into (3)

5x + 10(1 - 2y) = 25

5x + 10 - 20y = 25 ( subtract 10 from both sides )

5x - 20y = 15 → (4)

Multiply (1) by 20 and (4) by 3, then add to eliminate the y- term

40x + 60y = 340 → (5)

15x - 60y = 45 → (6)

Add (5) and (6) term by term to eliminate y, that is

55x = 385 ( divide both sides by 55 )

x = 7

Answer:

[tex]x = 7[/tex]

Step-by-step explanation:

From the equation [tex]2y + z = 1[/tex] , we can separate [tex]z[/tex] so that [tex]z = 1-2y[/tex].

The equation [tex]5x+10z = 25[/tex] can then be turned into:

[tex]5x+10(1-2y) = 25[/tex]

[tex]5x+10-20y = 25[/tex]

[tex]5x -20y = 15[/tex]

[tex]x-4y = 3[/tex] (divide by [tex]5[/tex] on both sides)

We can now use elimination to solve for one of the variable:

[tex]2(x-4y) = 2\times3[/tex] (times 2 to get [tex]2x[/tex] for elimination)

[tex]2x-8y=6[/tex]

[tex]2x+3y-(2x-8y) = 17-6[/tex]

[tex]11y = 11[/tex]

[tex]y = 1[/tex]

Now, we can use substitution to solve for [tex]x[/tex]:

[tex]2x+3y = 17[/tex]

[tex]2x+3 = 17[/tex]

[tex]x = 7[/tex]

Hope this helps :)

3x + 5 = 2x - 1 what does x=

Answers

Answer:

-6

Step-by-step explanation:

You want to subtract the 2x from both sides, leaving you with x+5= -1 and then you want to subtract the 5 from both sides which gets you to your final answer of x= -6

Answer:

x = -6

General Formulas and Concepts:

Pre-Alg

Order of Operations: BPEMDAS

Algebra I

Equality Properties

Step-by-step explanation:

Step 1: Define equation

3x + 5 = 2x - 1

Step 2: Solve for x

Subtract 2x on both sides:          x + 5 = -1Subtract 5 on both sides:            x = -6

Step 3: Check

Plug in x to verify it's a solution.

Substitute:                    3(-6) + 5 = 2(-6) - 1Multiply:                        -18 + 5 = -12 - 1Add/Subtract:               -13 = -13

Solve for x and y by elimination 3x+y=-1

Answers

Answer:

we need 2 equations to solve by elimination

Answer:

Step-by-step explanation:

for x

3x + y = -1

subtract 3x from both sides

y = -3x - 1

answer

for y

3x + y = -1

subtract y on from both sides

3x = -y -1

divide by 3

x = -1/2y - 1/3

answer

PLEASE HELP!!I GIVE BRAINLIEST

Answers

Answer:

Im pretty sure the first two are no..that's it

Answer:

A: No

B: Yes

C: Yes

D: No

Step-by-step explanation:

what is the slope of y = -4x - 7

Answers

Answer:

-4

Step-by-step explanation:

Slope intercept form is

-y = Mx + b

the slope is -4 because the m in y=mx+b is the slope for the graph. hope this helps!!

In a Petri dish there are currently 1,235 bacteria. The growth rate of bacteria is 3.25% How many bacteria will be there in the dish after 5 hours

Answers

Answer:

....

Step-by-step explanation:

Answer:

1,436

Step-by-step explanation:

First multiply the growth rate by the number of hours.

3.25 x 5 = 16.25

Now multiply 1,235 by 100. = 123,500

And also multiply 1235 by the remainder percentage not being used(83.75)= 103,060.75

Now subtract 123,500 - 103,060.75 = 20,439.25

Divide this number by 100 = 204.3925 which is what 16.25% of 1,235 is.

1,235 + 204 = about 1,439 but since i rounded up a few times the answer is actually 1,435.6875 rounded up to 1,436

There are 30 855 oranges harvested for sale, 6555 were sold on Monday, 4225
were sold on Tuesday and 7 295 were sold on Wednesday. What is the total
number of oranges sold from Monday to Wednesday?​

Answers

Answer:

18,075

Step-by-step explanation:

6555+4225+7295=18,075

Describe the slope of the line.

m =???

excuse the crack!!

Answers

Answer:

[tex]\frac{1}{2}[/tex]

Step-by-step explanation:

which list below shows the fractions in order from least to greatest
5/9,3/4,2/3,3/5
5/9,3/5,2/3,3/4
2/3,3/5,4/9,5/9
3/5,2/3,3/4,5/9

Answers

Answer:

Step-by-step explanation:

Its D

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