Explain answer !

Will give brainlst

 Explain Answer ! Will Give Brainlst

Answers

Answer 1

To solve a multi-variable problem, you need to isolate single variables. To do this, there are two ways to do it. One way you eliminate one of the variables and the other you substitute.

In this example, you are being asked to eliminate one of the variables. To do this, you multiply 2x+2y= 12 by 2 and get 4x+4y = 24.

See how now both equations contain a 4y?

Using this you can subtract one equation from the other.

5x+4y=28

- 4x+4y=24

And then you get x=4

To get the other variable, you substitute 4 in for x (in one of the equations) and then solve for y.

2(4) + 2y =12

8+2y= 12

2y=4

y=2

Therefore, x = 4 and y = 2


Related Questions

Mona needs to photocopy a 14.5 centimeters wide by 15 centimeters long picture. She wants to enlarge the picture so that its length will be
37.5 centimeters. How wide will the enlarged picture be?
O a
38.8 cm
Ob
37 cm
ос
93.75 cm
Od
36.25 cm

Answers

Answer:

The enlarged picture will have a width of 35.8 cm

Step-by-step explanation:

We can solve this question by proportions, using rule of three.

When the length is of 15 centimeters, the width will be of 14.5 centimeters. What is the width when the length is 37 centimeters?

15 cm - 14.5 cm

37 cm - x

Applying cross multiplication

[tex]15x = 14.5*37[/tex]

[tex]x = \frac{14.5*37}{15}[/tex]

[tex]x = 35.8[/tex]

The enlarged picture will have a width of 35.8 cm

Answer:

36.25 cm

Step-by-step explanation:

37.5 divided by 15 is 2.5 then multiply 14.5 by 2.5 and your answer will be 36.25 cm.

I hope this helps the last answer you got was close but incorrect. I really hope I get brainlyiest. :)

i need help on this problem ​

Answers

Answer:

72

Step-by-step explanation:

find the small square first. to find the height, subtract 3 from 9. you get 6. then to find the length, subtract 6 from 12. you also get 6. so the square is 6x6 which equals 36. then go to the top rectangle. hieght is 3 and length is 12. 3x12 is also 36. 36+36 is 72.

pls mark brainliest.

Need help!!! (will give brainliest)

Answers

Answer:

I think B 90

Step-by-step explanation:

Its a right angle

it's B because I look it up

Ira and his wife's monthly payment included $1,256.61 for principal and interest, as well as
one twelfth of the annual property taxes of $3,478.50 and one twelfth of the annual
insurance premium on the property of $1,186. What will the total monthly payment be?

Answers

Answer:

its 1,645.32

Step-by-step explanation:

search one twelfth of 3,478.50, then one twelfth of 1,186 and add those answers with 1,645.32

Please someone help me ASAP

Answers

Answer:

A

Step-by-step explanation:

FV=PV(1+i)^t

2500(1+.03)^4

A

Answer:

A

Step-by-step explanation:

It is the only one that shows 3% = 0.03 which is correct.

Use the formula to determine the slope of the line containing the two points (-6,6) and (-3,4)

A. -2/3
B. 7/12
C. -3/2
D. -2/9

Answers

4-6
-3-(-6)
-2/3
-2/3 is the slope
A. -2/3 is the slope and answer.

50 POINTS! SHOW WORK OR ILL REPORT

Answers

Answer:

The larger angle <K, has a measure of 120 degrees.

Step-by-step explanation:

So, a supplementary angle are two or more angles that combine to form a 180 degree straight line.  So here, we need to set up an algebra equation.

2x = the larger angle (because it's two times the smaller angle)

x = the smaller angle

So then, you need to set both equal to 180 degrees, since combine they equal 180 degrees

2x + x = 180

3x = 180

x = 60

Using basic algebra, we see that the smaller angle is 60 degrees, but wee need to find the larger angle.  Remember, we represented the larger angle as 2x.  

2 time 60 is 120, so the larger angle is 120 degrees

Hope that helps :)

4. Find the value of 8 + 12 + 4 + 6 x 1 + 2. Guys I am doing a test and I need help!!

Answers

32 is the correct answer I believe if using PEMDAS method

Solve 64 = h + 30.
K=?

Answers

Answer:

h = 34

Step-by-step explanation:

64=h+30

Step 1: Flip the equation.

h+30=64

Step 2: Subtract 30 from both sides.

h+30−30=64−30

h=34

Assuming you meant “h =?” instead of “K=?”. In that case,
h = 34.

To find this answer, you just subtract 30 from 64, isolating h on it’s own side. Or imagine the problem arranged “h + 30 = 64.”

10 ft р area = 170 ft​

Answers

Answer:

170 square feet

Step-by-step explanation:

Find the sum 7/10 + 20/100 as a fraction

Answers

Answer:

9/10

Step-by-step explanation:

=

7

10

+

20

100

=

7

10

+

1

5

=

7

10

+

2

10

=

7+2

10

=

9

10

(Decimal: 0.9)

Answer:

[tex]\frac{9}{10}[/tex]

Step-by-step explanation:

[tex]\frac{20}{100} = \frac{2}{10}[/tex]

[tex]\frac{7}{10} + \frac{2}{10} = \frac{9}{10}[/tex]

Which expression has a sum equivalent to
6
8
?

A.
1
2
+
2
4
B.
2
4
+
1
4
C.
7
8
+
1
8
D.
2
12
+
2
6

Answers

I think the answer is c

Lucy has a homework assignment and she must solve the equation
-7x + 2 = 51.

Answers

Answer:

x = -7

Step-by-step explanation:

-7x + 2 = 51

-7x = 51 - 2

-7x = 49

x = -7

Insta: 25k_kem

Help me pls pls pls

Answers

Oh gosh gosh oh yeah yeah oh okie oh gosh oh

367589+667556755788654578645

Answers

Answer: 667556755788655000000

Step-by-step explanation: braniliest pls

Which statement best describes the electric field around a positive charge?
A. Pairs of parallel lines with arrows that point inward extend from
the charge
B. Pairs of perpendicular lines with arrows that point outward extend
from the charge
C. Lines with arrows that point outward radiate from the charge in all
directions.
D. Lines with arrows that point inward radiate from the charge in all
directions

Answers

Answer:

C. Lines with arrows that point outward radiate from the charge in all

directions.

The statement which best describes the electric field around a positive charge is  Lines with arrows that point outward radiate from the charge in all directions, the correct option is C.

What is the unitary method?

The unitary method is a method for solving a problem by the first value of a single unit and then finding the value by multiplying the single value. Unitary method is a technique by which we find the value of a single unit from the value of multiple devices and the value of more than one unit from the value of a single unit. It is a method that we use for most of the calculations in math.

We are given that;

The four options

Now,

This is because the electric field at a point in space is in the direction of the force that the electric field would exert on a positive test charge if there were a positive test charge at that point in space1. Because positive charges repel each other, the electric field around an isolated positive charge is oriented radially outward.

Therefore, by unitary method the answer will be Lines with arrows that point outward radiate from the charge in all directions.

Learn more about the unitary method, please visit the link given below;

https://brainly.com/question/23423168

#SPJ2

which of the following best describes the quadratic function below ?

A. a parent function
B. an inverse function
C. opens right
D. opens down​

Answers

I thinks it’s opens right

Option A is correct, a parent function  best describes the quadratic function.

The quadratic function with a vertex at the origin and opening upward is best described as a parent function.

A parent function is the most basic form of a particular type of function.

In the case of quadratic functions, the parent function is f(x) = x².

It has a vertex at the origin (0, 0) and opens upward.

Therefore, a parent function  best describes the quadratic function.

To learn more on Quadratic equation click:

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2. Which of the following ordered pairs (x,y) satisfies the system of equations below?
x + y = 0
3x – 2y = 10
(3,2)
b. (2,-2)
(-2, 2)
d. (-2,-2)
a.
C.
timotor the nrice of a inh, in dollars, using the expression 60+

Answers

Answer:

b(2,-2)

Step-by-step explanation:

x= 2 and y=-2

let me know if you want further eplanation

Chester has a coupon for 1/10 off the price of a shirt. If a shirt originally costs $29.30, what discount would Chester receive from using his coupon?

A. $5.86
B. $0.34
C. $26.37
D. $2.93​

Answers

Answer:

26.37

Step-by-step explanation:

you change 1/10 too 10 percent then you multiply that too  29.30 and you get 2.93 then you subtract 2.93 from 29.30 and you get 26.37 :)

I agree with the person on top have a nice day:)

In the diagram, triangle MNO maps to triangle M'N'O'.
Identify the corresponding angles.

Answers

Answer:

B and A

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

Answer:

M' and N'O'

Step-by-step explanation:

Ms. Cathy bought a package of pencils. Out of every 10 pencils, 8 are black. If there are 30 pencils in the pack, what fraction of the pencing in the pack are black?
What percent of the pencils in the pack are black?
What fraction of the pencils in the pack is black?

Answers

Answer:

Fraction: 24/30 Percentage: 80%

Step-by-step explanation:

It might want a simplified version of the fraction, so the answer for that one could be 4/5. I hope this helps :)

The percent of the pencils in the pack are black is,

⇒ 80%

And, The fraction of the pencils in the pack is black is,

⇒ 24 / 30

What is mean by Percentage?

A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.

To Calculate the percent of a number , divide the number by whole number and multiply by 100.

Given that;

Ms. Cathy bought a package of pencils.

And, Out of every 10 pencils, 8 are black. .

Since, There are 30 pencils in the pack,

Hence, The percent of the pencils in the pack are black is,

⇒ 24 / 30 x 100

⇒ 2400 / 30

⇒ 80%

And, The fraction of the pencils in the pack is black is,

⇒ 8 / 10 = x / 30

⇒ 240 = 10x

⇒ x = 24

Thus, The fraction of the pencils in the pack is black is,

⇒ 24 / 30

Thus, The percent of the pencils in the pack are black is,

⇒ 80%

And, The fraction of the pencils in the pack is black is,

⇒ 24 / 30

Learn more about the percent visit:

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help im on a meeting this need to be done

Answers

Answer:

C

Step-by-step explanation:

two quarters=half

4/8=1/2

Find the area of these triangles please! Greatly appreciated if you do.

Answers

Answer:

11. 35 ft²

12. 24 cm²

13. 18 ft²

14. 28 in²

15. 9 in²

Step-by-step explanation:

11. A= (b×h)÷2

= (10×7)÷2

= 70 ÷ 2

= 35 ft²

12. A= (b×h)÷2

= (8×6)÷2

= 48 ÷ 2

= 24 cm²

13. A=(b×h)÷2

=(9×4)÷2

= 36 ÷ 2

= 18 ft²

14. A=(b×h)÷2

=(7×8)÷2

= 56 ÷ 2

= 28 in²

15. A=(b×h)÷2

=(3×6)÷2

= 18 ÷ 2

= 9 in²

Good luck ^_^

Hope this answer your question

6(840.25)+15(1,374.05)+9(1.222.43)/30

Answers

Answer:

26018.979

yea...

Tyler needs to complete this table for his consumer science class. He knows that 1 tablespoon contains 3 teaspoons and that 1 cup contains 16 tablespoons.
What are the values of t, x, y, and c ?​

Answers

Answer:

Step-by-step explanation:

This table reflects the proportional relationship amongst number of teaspoons, number of tablespoon, number of cups.

In other words these three measures are proportional.

By taking proportionality ratio of 'number of tablespoons' and 'number of cups' first.

[tex]\frac{12}{48}=\frac{C}{3}[/tex]

C = [tex]\frac{12\times 3}{48}[/tex]

C = 0.75

Similarly, [tex]\frac{y}{2}=\frac{12}{C}[/tex]

[tex]\frac{y}{12}=\frac{2}{0.75}[/tex]

y = [tex]\frac{24}{0.75}[/tex]

y = 32

Now, [tex]\frac{t}{36}=\frac{y}{12}[/tex]

[tex]\frac{t}{36}=\frac{32}{12}[/tex]

t = 96

By the same rule,

[tex]\frac{36}{x}= \frac{12}{48}[/tex]

x = [tex]\frac{48\times 36}{12}[/tex]

x = 144

Therefore, complete table will be,

Number of teaspoons       Number of tablespoons          Number of cups

          96                                            32                                          2

          36                                            12                                        0.75

         144                                            48                                          3

Can some one help me plz I really need help

Answers

1. 2x + 50 = 100
subtract 50 on both sides and then divide by 2.

x = 25

180 - 100 = 80

m
2. 7x - 4 = 87
add 4 on both sides and divide by 7.

x = 13

180 - 87 = 93

m
3. 5x - 2 = 38
add both sides by 2 and divide by 5.

x = 8

180 - 38 = 142

m
4. 14 + 6x = 134
subtract both sides by 14 and divide by 6.

x = 20

180 - 134 = 46

m
5. x = 53

m
6. x = 14

m

What percent is 45 out of 70

I’m so sorry to bother you guys I have been stuck on this problem

Answers

64.285714285714% that should be the answer

Is one half greater than four fifths

Answers

Answer:

No, it is not greater than four fifths.

Step-by-step explanation:

Well 1/2 of 4/5 would be about 2.5/5. So summing it up. . .

A recipe for sparkling apple juice calls for 3 quarts of sparkling water and 2 quarts of apple juice. How much sparkling water would you need to mix with 8 quarts of apple juice? (NC.7.RP.1) *

Answers

Answer:

Step-by-step explanation:

12

3. Tickets to a baseball game cost $22 each and parking costs $10. What is the equation of the line that represents the cost of attending the game?
A. y − 22=10x
C. y=20x − 10
B. y = 22x + 10
D. 22x+y=10

Answers

Answer:

The third one down.

Step-by-step explanation:

each ticket cost 22$ so 22$ pet ticket (X) plus parking

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