Solve the system of linear equations by elimination. Check your solution. 3x + 2y = 7 -3x + 4y = 5​

Answers

Answer 1

Answer:

(3x+2y=7-3x+4y)=5

3x+3x+2y-4y-7=5

6x-2y-7=5

6x-2y=5+7

=12

2(3x-y)=12

3x-y=12/2

= 6


Related Questions

How many degrees are on
the interior of a Polygon that
has 18 sides?

Answers

Answer:

ask yourself

Step-by-step explanation:

Answer:

160.00° Degrees

Step-by-step explanation:

To find the answer, we have to use the interior angle formula which is

(n-2)*180, where n is the number of sides. This formula gives us the sum of all interior angles in a polygon having ‘n’ sides.

For a polygon with 18 equal sides, first finding the sum of all interior angles of the polygon:-

=(n-2)*180= (18–2)*180=16*180=2880 degree.

We found the sum of all interior angles of 18 sided polygon and it is 2880 degrees.

The polygon we are considering has all sides equal, which means it is a regular polygon. So we can conclude that all of its interior angles are equal.

Sum of all eighteen angles=2880, One angle=2880/18=160 degrees.

Thus, we concluded that the interior angle of the regular eighteen sided polygon

is 160 degrees

What is the length of a base of a right triangle with an area of 15 meters and a height of 3 meters?

Question 1 options:

5 meters


12 meters


10 meters

Answers

Answer:

10

Step-by-step explanation:

15 = 1/2 * b * 3

15 * 2 = 3 * b

b = 30/3

b = 10 m

4 times the sum of 3 and x can the answer be 4x plus 3 ?

Answers

Answer:

4x + 3

Step-by-step explanation:

Since you can't add variables and numbers, just switch up the operations for each number.

Basically,

4(3+x)

4 times x = 4x

4x + 3

Answer:

The answer would be 4(3x).

Step-by-step explanation:

4 times: 4(_)

The sum of 3 and x: 3x

4(_)+3x = 4(3x).

Find the midpoint of the segment with the following endpoints.
(8,2) and (1,10)

Answers

Answer:

I am not sure but i think the midpoint is 4.5 and 6

simplify - 5 1/4 - (- 7 1/2)

Answers

Answer:

Hey! Your answer is, 9/4

Step-by-step explanation:

Hope this hepls! :)

Have a nice day!♥

Brainliest?

Answer:

Exact Form:

91/20

Decimal Form:

4.55

Mixed Number Form:

4 11/20

Step-by-step explanation:

40. Which two are equivalent to 4?
A A √2
BV8
C V16
D V12
E V64

Answers

Answer:

a or b

Step-by-step explanation:

PLEASE HELPP!!!!

ive been stuck on this for 3 days i feel clueless

Answers

Answer:

C.

Step-by-step explanation:

I think im right!

Hopefully it helps!

Answer:

the answer is letter C I'm sure

Samaia buys two water bottles and three bags of chips for $9.45. Abdullah goes to the same store and buys four water bottles, as Samaia, and five bags of chips, same as ones Samaia bought, for $14.75. Which choice below accurately represents a system of equations, w for water bottles and c for chips, for this scenario? Each water bottle is same price and each bag of chips is same price. * A) 3w + 2c = 9.45 AND 5w + 4c = 14.75 B) 2w + 3c = 9.45 AND 4w + 5c = 14.75 3) 2w + 3c = 14.75 AND 4w + 5c = 9.45 D) 5c + 9w = $24.20

Answers

Answer:

B) 2w + 3c = 9.45 AND 4w + 5c = 14.75

Step-by-step explanation:

Let us represent:

Number of water bottles = w

Number of bag of chips = c

Hence:

Samaia buys two water bottles and three bags of chips for $9.45.

2w + 3c = 9.45......Equation 1

Abdullah goes to the same store and buys four water bottles, as Samaia, and five bags of chips, same as ones Samaia bought, for $14.75.

4w + 5c = 14.75......Equation 2

Which choice below accurately represents a system of equations, w for water bottles and c for chips, for this scenario?

Option B) 2w + 3c = 9.45 AND 4w + 5c = 14.75 is the correct option.

solve for x or find x ​

Answers

X=4
And to prove it
8(4)-1=31

[tex] \huge \purple{\tt{Answer:}} [/tex]

In a rectangle , opposite sides are equal in length .

So ,

[tex] \sf {8x-1=31} \\\\ \implies \sf {8x=31+1=32} \\\\ \implies \sf{x={\dfrac{32}{8}}} \\\\ \implies \sf{x=4} [/tex]

2/5 of 146 as a decimals

Answers

I think it’s 58.4 I’m not sure if my answer is completely right . Just let me know if I’m right . Hope this can help

Check whether -2 is a zero of the polynomial 3x2 + 4x + 32 .

Answers

Answer:

x = - 2 is not a zero

Step-by-step explanation:

If x = - 2 is a zero of the polynomial then f(- 2) = 0

f(x) = 3x² +4x + 32

f(- 2) = 3(- 2)² + 4(- 2) + 32 = 3(4) - 8 + 32 = 12 - 8 + 32 = 36

Since f(- 2) ≠ 0 , then x = - 2 is not a zero of the polynomial

49x^2 -_x + 16

Can someone help with the missing number

Answers

Step-by-step explanation:

I'm guessing this is competing the perfect square

so it's 56

Answer:

Step-by-step explanation:

4x² + 28x + 49

4x² + 14x + 14x + 49

2x(2x) + 2x(7) + 7(2x) + 7(7)

2x(2x + 7) + 7(2x + 7)

(2x + 7)(2x + 7)

(2x + 7)²

= 28

PLSSSS HELPPP
I NEED TO FINISH THIS ASSIGNMENT!!!
WILL MARK BRAINLIEST


He has a cow and a buffalo on his farm. The two animals had cost him Rs 1800 and Rs 2400 respectively. Selling the cow will fetch him a profit of 10% whereas on the buffalo he will suffer a loss of 5%


What is the selling price of the buffalo????

WITH WORKING​

Answers

Answer:

the two animals had cot him R 18000 and Re 2400 respectively

Find (-4) x -(-5)
What is the answer to this?

Answers

Answer:

-20

Step-by-step explanation:

el area de un rectangulo es 84 cm cuadrados si la base mide 9 cm cuanto mide la altura y cual es su perimetro?​

Answers

Si pero no pero hello en ese yo tu pero ella es un loca

Sami lights up a candle every 10 minutes. Every candle burns for exactly 40 minutes. How many candles are burning exactly 55 minutes after Sami lit up the first candle?

Answers

Answer:

4

Step-by-step explanation:

Candle is lit every 10 minutes :

Number of candles lit in 55 minutes:

Starting from 0 minute ; Numbe rod candles lit on 55 minutes = 6

1st candle burns out after 40 minutes

Second burns out after 50 minutes

Third will burn out after 60 minutes

Hence Number of candles still burning :

Number of candles lit - Number of candle burnt out

6 - 2 = 4 candles

If 91 is 1% of a number, what is that number? *

Answers

Answer:

The Answer is 1900.

Answer:

9100

Step-by-step explanation:

multiply the one percent by 100 to get the 100 percent

Ada is making rice. The instructions call for 2 1/4 cups of water for 1 cup of rice. Ada is using only 1/3 cup of rice.

Answers

Answer:

3/4 cup of water

Step-by-step explanation:

2.25 (2 1/4) divided by 3 (or times 1/3) is 3/4

The required number of cups of water is 3/4 cups of water

What is an Equation?

Equations are mathematical statements with two algebraic expressions flanking the equals (=) sign on either side.

It demonstrates the equality of the relationship between the expressions printed on the left and right sides.

Coefficients, variables, operators, constants, terms, expressions, and the equal to sign are some of the components of an equation. The "=" sign and terms on both sides must always be present when writing an equation.

Given data ,

The number of cups of rice = 1 cup

The number of cups of water for making rice = 2 1/4 cups of water

So the equation for

The number of cups of water for 1/3 cups of rice =
Number of cups of water for making rice / 3

The number of cups of water for 1/3 cups of rice = 2 ( 1/4 ) / 3

                                                                                 = 9/4 / 3

                                                                                 = 3 / 4 cups of water

Therefore , the number is 3/4 cups of water

Hence , The required number of cups of water is 3/4 cups of water

To learn more about equations click :

https://brainly.com/question/10413253

#SPJ5

Show set of data that is a function using at least 5 domain values and 5 range values. It can be shown in a format of your choice

Answers

Answer:

Five domain values of the function f(x) = x² - 1, are; 1, 2, 3, 4, 5

Five range values of the function f(x) = x² - 1, are; 0, 3, 8, 15, 24

Step-by-step explanation:

The values in the domain are the values of the independent or (normally) x-variable

The values i the range are the values obtained by applying the function relationship to the domain as follows;

Let 'f(x)' represent the function that generates the values of the data in the data set,

For f(x) = x² - 1, we have the following table;

[tex]\begin{array}{ccc}x&f(x)\\1&0\\2&3\\3&8\\4&15\\5&24\end{array}[/tex]

Therefore;

The function is f(x) = x² - 1

The five domain values are; 1, 2, 3, 4, 5

The five range values are; 0, 3, 8, 15, 24.

Can someone please help me and explain

Answers

(2x-3)+(6x+7)= 180
(2x•6x)+(-3+7)= 180
(12x)+(4) = 180
12x= 180-4
x= 176/12
x= 14.67

Sami has 12 Balloons . 2/3 of them are Green and the rest is Red balloons. What's is the ratio of Green to Red balloons

Answers

8:4 or 2:1 simplified

 The students at a high school collected $3,800 to buy stuffed animals to give to a children’s hospital. The students bought both stuffed bears and stuffed dogs. Each bear cost $7, and each dog cost $8. The students bought a total of 500 stuffed animals and spent all the money. How many stuffed dogs did the students buy? A. 200 B. 205 C. 295 D. 300​

Answers

Answer:

D. 300

General Formulas and Concepts:

Pre-Algebra

Order of Operations: BPEMDAS

Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right

Equality Properties

Multiplication Property of Equality Division Property of Equality Addition Property of Equality Subtraction Property of Equality

Algebra I

Solving systems of equations using substitution/elimination

Step-by-step explanation:

Step 1: Define Variables

Stuffed bears = b

Stuffed dogs = d

Step 2: Define Systems

$7b + $8d = $3800

b + d = 500

Step 3: Rewrite Systems

b + d = 500

[Equality Property] Multiply everything by -7:                                                 -7b - 7d = -3500

Step 4: Redefine Systems

7b + 8d = 3800

-7b - 7d = -3500

Step 5: Solve for d

Elimination

Combine 2 equations:                                                                                      d = 300

Step 6: Define Answer

d = 300 means that the students bought 300 stuffed dogs.

Answer:

D

Step-by-step explanation:

Remark

Let the stuffed bear = x

Let the stuffed dog = y

Equations

x + y = 500                   (1)

7x + 8y = 3800               (2)

Solution

There are two ways you could do this. You can use substitution or you could use multiplying equation 1 by either 7 or 8 to get rid of the x or y.

Multiply (1) by 7

7x + 7y = 3500             (3)       Write equation (2) below (3) and subtract

7x + 8y = 3800                        Subtract

    -y = - 300                            Multiply by - 1

     y = 300

Use the result for y to get x using equation 1

x + y = 500

x + 300 = 500                         Subtract 300

x = 500 - 300

x = 200

Stuffed bears = 200

Stuffed dogs   = 300

A person walks 1/3 of a mile every half hour. How far
would the person walk in 2
hours?

Answers

Answer:

1 1/3 miles

Step-by-step explanation:

1/3 is for a half-mile, so double it to 2/3 for one mile.

Now double it again for two hours.

2/3 + 2/3 = 1 1/3 miles in two hours

Answer:

The person will walk 1 1/3 miles in 2 hours.

Step-by-step explanation:

There are 4 half-hours in 2 hour

1/3*4=4/3 or 1 1/3 miles

Circle D is shown. Line segment F E goes through point D. Line segment C D is shown. Line segment G H goes from one side of the circle to the other side. Line segment A B is outside of the circle and intersects the circle at point B.
In circle D, which is a secant?

EF
DC
Line segment A B
Line G H

Answers

A secant crosses the circle without passing through the center

The secant line is (c) line segment AB

How to determine the secant line

From the question, we understand that line segment AB passes through the circle, without passing through the center (i.e. point A) of the circle

This indicates that line segment AB is a secant

Given that the center of the circle is point D

Hence, the secant line is (c) line segment AB

Read more about secants at:

https://brainly.com/question/25871159

Answer:

D. Line GH

Step-by-step explanation: I just did it on edge 2023. Hope this helps!

6 (8j - 3l + 9 ) 12l + 14j

Answers

Answer:

5822j-15972

Step-by-step explanation:

Answer:

5822j-15972

Step-by-step explanation:

There is a sale on Blu-rays in a local shop – 20% off selected items. Your favorite Blu-ray before the sale cost $18. How much will you save? How much will you pay?

Answers

Answer:

save $3.6, pay $14.4

Step-by-step explanation:

A cd costs $18

If there is a 20% discount, you only have to pay 80% of the original price.

This means you only have to pay (0.80 x $18=) $14.4 dollars, which means you saved ($18 - $14.4=) $3.6.

Or you could just do $18 x 0.20 = $3.6

5 cups equals how many pints and cups

Answers

Answer:

5 cups is 2.5 pts

Step-by-step explanation:

cups pts

5.00 2.5

5.01        2.505

5.02 2.51

5.03 2.515

Which theorem proves these triangles are similiar for brainliest

Answers

[tex]{\huge{\pink{\mathcal{AA\:postulate࿐❤}}}} [/tex]

Which is the decimal equivalent of 2/3

A. 0.23
OB. 0.32
O c. 0.3
O
D. 0.6

Answers

The answer is d 0.6.......
The answer would be 0.6

I’ll mark branliest!

2. Lindsay is financing $350,000 to purchase a house. How much money will she save over the life of a 30-
year, fixed-rate loan by buying 3 points with a rate of 6.375% instead of not buying points with a rate of
6.75%?

A. $2,596.50
B. $13,096.50
C. $20,658.00
D. $31,158.00

Answers

Answer:

D

Step-by-step explanation:

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